Symptoms of a failing camshaft sensor? (Solved)

Read ahead to see what we at Fred Beans think are the 4 most common symptoms of a bad crankshaft position sensor:

  • Your Check Engine Light is Blinking.
  • It’s Difficult to Get Your Vehicle to Start.
  • Your Vehicle is Stalling and/or Backfiring.
  • The Engine is Making Your Vehicle Vibrate.

What happens when a camshaft sensor goes bad?

Poor Drivability A failing camshaft position sensor begins losing its ability to quickly transfer data. Mismatched fuel delivery and ignition timing, even if off by a few milliseconds, will cause your vehicle to sputter, accelerate poorly, lack power, stall or even shut off.

How do I know if my camshaft position sensor is bad?

If your vehicle idles roughly, stalls frequently, has a drop in engine power, stumbles frequently, has reduced gas mileage, or accelerates slowly, these are all signs your camshaft position sensor could be failing.

What is the 7 symptoms of a bad camshaft position sensor?

Looking for a good online repair manual?

  • #1 – Check Engine Light Illuminates.
  • #2 – Ignition Problems.
  • #3 – Car Jerking or Surging.
  • #4 – Engine Stalling.
  • #5 – Poor Acceleration.
  • #6 – Problems Shifting.
  • #7 – Bad Fuel Mileage.

How do you test a camshaft position sensor?

Touch one of your meter probes to either one of the sensor wires and the other to the other wire. Check your meter display and compare your reading to your manual specifications. In most cases, you’ll see a fluctuating signal between 0.3 volts and 1 volt. If there’s no signal, you have a bad sensor.

Can I drive with a bad cam sensor?

Yes, it is safe to drive with a bad camshaft sensor. However, the performance of your engine will not be as good and fuel consumption may increase. In some cases, the camshaft may need replacement if there are any other symptoms of failure on this component.

Should you replace both camshaft sensors?

Two on each head and one for each camshaft. I wouldn’t recommend replacing camshaft sensors without a thorough diagnosis. The 1200 camshaft code is a cam timing problem. It could be a mechanical problem with the chain or a problem with the system that adjusts the variable valve timing.

What sensors can cause a car not to start?

A bad Crankshaft Position sensor is a common cause of no starts. The signal from this sensor goes to the PCM or ignition module that switches the ignition coil(s) on and off. If you have an RPM signal, a bad ignition module or PCM may not be switching the coil(s) on and off.

Will a bad crankshaft sensor throw a code?

A failing or failed crankshaft position sensor may cause the check engine light on your dashboard to come on. A diagnostic scan tool will show a code between P0335 and P0338.

Will a bad camshaft sensor cause rough idle?

Engine Idles Roughly: A rough idling engine could be caused by a failing camshaft position sensor. This issue is more evident when the engine is idling. Hesitation: Hesitation during acceleration is a common issue that you may experience with a bad camshaft sensor.

Can a car run without a camshaft position sensor?

The car doesn’t run. The engine will either start or stall if it doesn’t turn over. The engine will run poorly if the same sensor is unplugged and no signal is sent.

What’s the difference between a camshaft sensor and a crankshaft sensor?

The crankshaft position sensor monitors as a multifunctional sensor used to set ignition timing, detect engine RPM and relative engine speed. The camshaft position sensor is used to determine which cylinder is firing to synchronize the fuel injector and coil firing sequence.

Can a bad camshaft position sensor cause low oil pressure?

and having a bad camshaft position sensor may indirectly cause low oil pressure in your car.

What makes crankshaft sensor go bad?

There are a few things that can cause the crankshaft position sensor to fail, including damage, debris and faulty circuitry. Even for modern electronics, the engine is a violent and destructive environment. Though built for this, most sensors eventually succumb to the ever-present heat and vibrations of the engine.

What is the code for camshaft position sensor?

What Does Code P0340 Mean? The OBD-II diagnostic trouble code P0340 indicates a “Camshaft Position Sensor “A” Circuit Malfunction.” It covers the entire circuit attached to the aforementioned sensor, such as the electric wiring and the powertrain control module (PCM).

Symptoms of a Failing Camshaft Position Sensor

The days of carburetors and distributors are over, and they have been replaced with a slew of sensors that assist a car’s computer in extracting the most performance possible from the engine. A camshaft position sensor (or any sensor) may fail as a result of normal wear and tear or as a result of an accident. Here’s all you need to know about the situation.

What Is a Camshaft Position Sensor and What Does It Do?

A camshaft position sensor is an electrical device that performs exactly what its name indicates — it monitors the position and speed of the camshaft — and transmits that information to the vehicle’s engine management module for further processing (ECM). The ECM requires this information in order to manage the amount of fuel that enters the combustion chamber and the timing of the ignition (spark) to ignite the fuel. It is possible to boost engine power and fuel economy while simultaneously reducing tailpipe emissions if the air/fuel combination is ignited at the proper moment.

When you foot on the accelerator, the sensor sends gasoline and spark to the appropriate cylinder, causing the engine to start.

What Are the Symptoms of a Bad or Failing Camshaft Position Sensor?

Typically, a malfunctioning camshaft position sensor is indicated by a malfunctioning Check Engine light. In addition to efficiently monitoring vehicle hardware and software, on-board diagnostics II systems can identify part degradation that causes subtle performance changes before a part entirely fails. It is preferable to take your vehicle to a mechanic when the Check Engine light activates, even if you may connect to the ECM using a do-it-yourself diagnostic tool to attempt to diagnose the problem.

2. Poor Drivability

A failing camshaft position sensor begins to lose its capacity to convey data fast as soon as it begins to malfunction. When your car’s fuel supply and ignition timing are mismatched, even by a few milliseconds, the vehicle will splutter, accelerate poorly, lack power, stall, or even shut down.

3. Transmission Shifting Problems

It is possible that data received by the ECM from a malfunctioning camshaft position sensor will cause the transmission shift solenoids to fail and the gears to not shift. On some models, it is referred to as ‘limp-home mode,’ and it is designed to safeguard the engine from harm by limiting the engine speed.

4. Bad Fuel Economy

Inaccurate camshaft position sensor data can cause fuel injectors to remain open for an excessive amount of time, resulting in excessive fuel being forced into the combustion chamber. When a large amount of liquid gasoline (which does not compress) accumulates in the combustion chamber, this can also result in engine knocking and significant damage.

The Engine Will Not Start

The failure of your camshaft position sensor will result in your car not starting if you disregard the indications indicated above. As the signal from a camshaft position sensor becomes weaker, the data it communicates to the ECM becomes weaker as well. Eventually, the data signal gets so faint that the ECM shuts off fuel and spark supply, resulting in your engine failing to turn over and not starting. If this occurs while your car is parked, it is merely an unpleasant annoyance; but, if it occurs while you are driving, it might result in a very deadly situation if your automobile shuts down.

The camshaft position sensor may need to be changed if your vehicle is not performing as well as it once did or if the Check Engine light is illuminated. If you continue to ignore these indications, your engine will eventually fail to start.

7 Symptoms of a Bad Camshaft Position Sensor (and Replacement Cost in 2022)

The most recent update was made on September 7, 2021. It is only one of numerous electrical components used in a car, including the camshaft position sensor (CMP). When it comes to this component, we’ll discuss what it is, what the symptoms of a defective camshaft position sensor are, and how much you can expect to pay for a replacement when it is broken. Are you looking for a reliable online repair manual? The top five choices may be found by clicking here. There is a lot of confusion between the camshaft position sensor and the crankshaft position sensor since they both sound similar.

Engines with a single overhead cam vs engines with two overhead cams are similar.

What is a Camshaft Position Sensor?

Every contemporary automobile is equipped with a camshaft position sensor. This sensor is an extremely crucial component of any vehicle since it assists in ensuring that the engine is operating correctly and efficiently. When you peek beneath the hood of your automobile, you may have difficulty locating the sensor. For attaching the sensor, most automobile manufacturers will choose a specific location near the engine that is exclusive to their brand of vehicle. It can be found in a variety of locations, including the back of the cylinder head, the lifter valley of the car, and adjacent to the engine block.

This information is subsequently transmitted to the powertrain control module (PCM) for use in the operation of the fuel injectors and/or the ignition system.

Common Symptoms of a Faulty Camshaft Position Sensor

When your camshaft position sensor becomes defective or begins to have problems, the first thing you should notice is that your ‘Check Engine’ light illuminates on your dashboard, indicating that something is wrong. It goes without saying that the ‘Check Engine’ light might signal a multitude of issues, including but not limited to a malfunctioning camshaft position sensor. The best course of action in this situation is to either use an OBD2 scan tool to get the stored diagnostic issue code(s) in your automobile or have a professional mechanic analyze the vehicle’s engine control module to determine what is going on.

Please do not ignore or postpone scanning your car or having it examined when your Check Engine light illuminates, as this might result in catastrophic damage to your engine’s internal combustion engine.

P0010 Code, P0011 Code, P0013 Code, P0016 Code, P0340 Code, P1345 Code are all codes that are related to each other.

2 – Ignition Problems

Because when a camshaft position sensor begins to have difficulties and becomes weaker, the signal supplied to the car’s computer becomes weaker as well.

Therefore, the signal will become weaker over time, to the point where it will no longer allow the car to start since there will be no spark from the ignition.

3 – Car Jerking or Surging

During the course of driving your vehicle, if the camshaft position sensor begins to fail, the engine will at times simply lose power, causing your vehicle to jerkor and surge ahead at random intervals. This is a result of an inaccurate quantity of fuel being injected into the cylinders due to the PCM receiving wrong information from the camshaft position sensor, as is the case with the other two symptoms.

4 – Engine Stalling

The possibility of your engine shutting down or stalling while you’re driving is an even worse situation than not being able to start your automobile. This occurs when the fuel injectors are not being instructed to feed gasoline into the engine cylinders. We don’t think we need to inform you how deadly the situation may potentially be.

5 – Poor Acceleration

When your camshaft sensor begins to fail, your car will not only jerk, but it will also be unable to accelerate very quickly. In certain circumstances, you’d be lucky if you were able to accelerate above 30 miles per hour. The poor acceleration is caused, once again, by faulty fuel distribution by the injectors in the engine.

6 – Problems Shifting

A malfunctioning camshaft position sensor in some automobile models can result in a locked gearbox that remains stuck in a single gear for an extended period of time. The only way to get out of that gear is to turn off your engine, wait a few seconds, and then turn it back on. It should be noted that this is only a temporary remedy, and the problem will recur, necessitating the replacement of the sensor as a permanent solution. As a result, your car may enter ‘ limp mode,’ which prevents you from shifting gears or accelerating past a particular speed after a set period of time.

7 – Bad Fuel Mileage

Providing insufficient gasoline to the engine is the polar opposite of this situation. In this situation, because of an incorrect reading from a defective camshaft position sensor, more fuel is pumped into the engine than is necessary, resulting in a decrease in fuel economy.

Camshaft Position Sensor Replacement Cost

You should expect to pay anywhere from $95 and $200 to have a camshaft position sensor replaced in your vehicle. The parts alone will cost between $25 and $100. For a competent replacement, labor prices will be in the region of $70 to $100 per hour. Expect to pay extra if you drive a fancy vehicle or if you have your vehicle repaired at a local auto dealership. There will also be additional fees and taxes imposed on top of these charges as a result of this.

Can You Replace a Camshaft Position Sensor Yourself?

Yes. Most people can complete this task, and it is a simple method to save yourself the minimum labor price (which is sometimes close to $100) that a repair shop or dealership would charge you. It should take no more than 5-10 minutes to change the battery.

How to Replace a Camshaft Position Sensor

  1. Locate and disconnect the negative battery cable. Disconnect the positive battery cable. A common location is on the top, front, or rear of the engine. It will almost certainly be connected with a 2-3 wire connection. To detach the wires from the sensor, release the tab on the sensor’s housing. Remove the mounting bolt that holds the sensor to the engine and set it aside. Most of the time, it’s an 8mm or 10mm bolt. With a little twist, remove the sensor from the circuit. A little amount of motor oil should be applied to the o-ring of the new sensor. Installation of the new camshaft position sensor and tightening down with the mounting bolt The sensor’s wire connector should be reconnected. Connect the negative battery terminal to the positive battery terminal.
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The camshaft position sensor is not generally checked when you bring your car to a dealership or repair shop for routine service or a tune-up unless the mechanic specifically requests it. If you have encountered any of the warning indications described above, notify your service provider that you believe the problem may be related to the camshaft position sensor.

This will allow them to rapidly check the camshaft position sensor to see if it is the source of the issues they are experiencing.

10 Symptoms of A Failing Camshaft Position Sensor in Your Car

On behalf of admin on December 24, 2020 The camshaft position sensor keeps track of the speed and position of the camshaft. It communicates with the engine control module by sending the data it has collected. This allows the ECM to determine how much fuel is required as well as when the spark should occur.

Common Causes Camshaft Position Sensor Failure

The camshaft position sensor, like every other component in your car, is susceptible to failure. The most common reasons for camshaft position sensors to fail include regular wear and tear, as well as accidents.

Symptoms of a Failing Camshaft Position Sensor

When the camshaft position sensor fails, there are often a few warning indications that you should be aware of. Keep a look out for the following typical signs and symptoms:

  • Inaccurate data from a faulty camshaft position sensor will be provided to the engine control module, resulting in poor fuel economy. Because of incorrect information, your engine will not be able to operate as effectively as it should, resulting in increased fuel consumption. It is possible for an engine to stall if the fuel injectors are not supplying a enough amount of fuel. Engine Idles Roughly as follows: A failed camshaft position sensor might be the source of a harsh idle engine. When the engine is idle, this problem becomes more noticeable. Hesitation: When you have a defective camshaft sensor, you may notice hesitation when accelerating
  • This is a typical problem. The engine will not be able to burn gasoline effectively if it is not working correctly, as evidenced by the failed emissions test. This has the potential to result in greater emissions. A distinct gas scent may be detected when unburned gasoline makes its way out of your exhaust
  • This is caused by unburned fuel. Car will not start: As the camshaft position sensor degrades over time, the signal it delivers to the engine control module becomes weaker, and the car will not start. The engine will not be able to start once the signal has been lost by the vehicle’s computer. Engine Misfires: A faulty camshaft position sensor might cause your engine to misfire
  • This is caused by the sensor failing. Gearbox Shifting Issues: The information given to the engine control module might cause the transmission to malfunction and fail to shift properly. Depending on the vehicle, there may be a security function that places the vehicle in ‘ limp mode.’ Significant engine damage is avoided as a result of this. Indication of a problem with your car: The check engine light will illuminate when your vehicle is having a malfunction. A variety of distinct factors might cause the light to illuminate. If you have a warning light illuminated on your dashboard, have your mechanic perform a diagnostic check. as quickly as possible in order to identify the specific nature of the problem If the light is flashing, pull over as soon as it is safe to do so and switch off your vehicle. Call for a tow truck. Keep driving your vehicle until you have reached your destination.

Replacing the Camshaft Position Sensor

If you are suffering the signs and symptoms of a failed camshaft position failure, schedule an appointment as quickly as possible. Addressing the problem as soon as possible might help to avoid subsequent failures and increased service rates. The replacement of a camshaft position sensor may be accomplished quickly and affordably. It is possible to save money in the future by taking care of a failure now.

Driving with a Bad Camshaft Position Sensor

Despite the fact that you can continue to drive with a faulty sensor, we do not suggest that you do. In addition, continuing to drive the automobile may result in other failures in other sections of the vehicle, which may result in a bigger service cost. Additionally, when the sensor fails, your vehicle may stall. If you do this, it may be extremely dangerous for you, your passengers, and everyone else on the road.

Book Your Service Today

We at McIlvain Motors are here to assist you in any way we can. The team here will go above and beyond to ensure that your experience is a great one. With the lowest labor rates in the state of Arizona, we are confident that you will be entirely happy with the service you receive from our company. We even provide complimentary Uber pickup and drop off. Our mechanics have received factory training and are capable of handling all of your vehicle’s servicing and repair needs. Porsche, Audi, and Volkswagen models are among those that we happily service.

Give us a call if you require frequent maintenance or if your camshaft position sensor is not functioning properly.

480-968-2858 or 939 S.

Symptoms Of A Bad Camshaft Position Sensor And Replacement Cost

The camshaft is an extremely crucial component of the engine of an automobile. Its primary function is to regulate the flow of air into and out of the engine. Another component that it may drive is the gasoline pump. It may also drive other components such as the oil pumps and the power steering pump. Given that the camshaft is in charge of possibly the most crucial role in the automobile, which is controlling the intake and exhaust rates, a variety of symptoms may manifest themselves if something is wrong with the machine.

A timing belt or timing chain connects the camshaft to the crankshaft, which allows the engine to run smoothly.

A malfunctioning camshaft position sensor can cause the synchronous process to be disturbed, resulting in a variety of symptoms.

In this tutorial, we’ll go over everything you need to know about a faulty camshaft position sensor, including the cost of replacement and how to diagnose the problem yourself.

What Is A Camshaft Position Sensor?

In the same way that the crankshaft and camshaft function in tandem, their respective sensors do the same. The camshaft position sensor transmits information to the engine control unit, which in turn uses that information to generate power for the engine in question. The engine control unit and camshaft, in conjunction with a sensor, guarantee that the proper quantity of fuel and air is introduced into the combustion chamber and that the engine ignites at the precise instant it is intended to do so.

Symptoms Of A Bad Camshaft Position Sensor

Because a camshaft position sensor plays such a crucial role, it can cause a variety of problems if it malfunctions. The following are the most typical symptoms that arise when this happens:

  • Check engine light on
  • Engine stalling
  • Inability to start the vehicle
  • Rough idle
  • Reduced engine power
  • Poor gas efficiency
  • Etc.

All of these symptoms may manifest themselves singly or in combination. In the vast majority of situations, the check engine light will appear simultaneously with one or more of the aforementioned symptoms. Each of the symptoms listed will be discussed in further detail in the text below, allowing you to have a better understanding of the problem impacting the camshaft position sensor.

Check Engine Light

The presence of a check engine light is the most prevalent indicator of a faulty camshaft position sensor in your vehicle. As is always the case, when the light turns on, it will be difficult to determine what the problem is. You should use an OBD2 scanner to scan your vehicle for any problem codes in order to gain a clearer picture. If you do not have access to an OBD2 scanner, you should get your automobile serviced by a professional. If at all possible, avoid driving your automobile while the light is illuminated, since this might result in more damage to your vehicle.

In several instances, the so-called ‘ limp mode’ may be activated.

When the limp mode is on, you should be able to drive your automobile to the nearest shop in most cases.

Stalled Engine

When the engine stops, it is a more serious, although luckily less common, symptom. Whether you are in a parking space or driving down the road, this might happen. The latter circumstance has the potential to be exceedingly hazardous. If your engine stalls abruptly, you should not attempt to drive the vehicle. This issue happens when no combustion occurs as a result of insufficient fuel or air entering the combustion chamber at the appropriate time.

Unable To Start The Car

When the engine stalls, it is a more dangerous but fortunately less common symptom. This might happen when you are in a parking space or while you are driving along the highway. The latter circumstance has the potential to be exceedingly harmful.

Avoid driving the automobile at all costs if your engine stalls abruptly. If no combustion happens because neither fuel nor air reaches the combustion chamber at the appropriate time, this is referred to as an incomplete combustion.

Rough Idle

In the event that everything is functioning properly, a pleasant and steady idle will go mostly undetected by the driver. However, if theidleis is rough, it will be quite evident when driving because of the increased drag. If the camshaft position sensor is not functioning properly, the rough idle is caused by the unsynchronized combustion that occurs in the cylinders. It is also possible that a defective fuel pump or EGR valve is responsible for a harsh idle. It is critical to understand what is causing the harsh idle, regardless of the source.

Reduced Engine Power

Reduced engine power manifests itself in two ways. Either the reduced power is due to the limp mode, which is being used as a precaution, or there is no warning or light on the dashboard and the car drives erratically. When accelerating, you may notice a reduction in engine power, or you may just notice a decrease in engine speed when coasting or idling. When accelerating, it may also manifest itself as vibrations in the body. A combination of poor combustion and misfires occuring in the engine cylinders is to blame for all of this.

Bad Gas Mileage

Because the camshaft sensor sends false information to the engine management unit, an abnormally large amount of fuel may be delivered into the combustion chamber as a result of the faulty information. Furthermore, not only will there be more gasoline injected, but the combustion will also take place at a sub-optimal period, resulting in more unburned fuel and, as a result, poor gas economy. Because it occurs over an extended period of time, this symptom may be more difficult to detect. Your car’s typical fuel mileage will also need to be considered while making this decision.

Replacement Cost For A Camshaft Position Sensor

Ultimately, if it is determined that your camshaft position sensor is defective, you will need to have it replaced with a new one. You may even do it yourself if you have previous expertise working on automobiles. While it is not difficult to replace the sensor, the sensor may be located in an awkward location that requires special tools to access. This implies that you may have to be patient as you replace it. When it comes to purchasing a new sensor, expect to pay between $90 and $140 on average.

The cost of a replacement automobile is determined by the kind of vehicle and the location of the repair business, just as it is with any other replacement.

Expect to pay between$160 and$240 for a camshaft position sensor replacement, depending on the situation.


The camshaft position sensor is a little device, yet it is critical to the operation of your car’s engine. As a result, the engine’s combustion chamber is properly timed so that fuel and air are burned at the right moment. It has a close working relationship with the crankshaft as well as with the engine control unit. If the sensor does not function properly, a variety of symptoms may manifest themselves. Typically, the check engine light will illuminate. Other signs and symptoms include poor gas mileage, a rough idle, engine stalling, and a reduction in engine power.

Leaving your automobile with a skilled technician and allowing them to diagnose and remedy the problem is usually the best option.

The cost is determined on the type of vehicle you drive as well as the repair business that does the job.

If you have the proper equipment and patience, you might replace the sensor on your own if you so want. In such situation, the only thing you’d have to do is purchase a replacement sensor, which should cost between $90 and $140 at most.

6 Signs Of A Bad Camshaft Position Sensor (Replacement Cost)

The engine uses the information from both the crankshaft and camshaft sensors, and therefore the failure of one or both of these sensors might have an impact on the engine’s readings and overall performance. When you are driving the automobile or the engine is operating, the camshaft sensor is constantly in operation and ready to detect any problems. As a result, the camshaft sensor’s performance might deteriorate over time. It can also be harmed by oil leaks and fractures from time to time. It is also possible that the ring gear will wear out and cause interference with the readings.

Let’s start by taking a look at the symptoms themselves.

Other difficulties such as poor engine performance or a misfiring engine may also be noticed by the driver.

Listed below is a more in-depth description of the six most typical indications of a malfunctioning camshaft position sensor.

Bad Camshaft Position Sensor Symptoms

The most typical indication of a malfunctioning camshaft position sensor is that the automobile may start more difficultly or not at all, depending on the situation. As the camshaft sensor grows weaker, it is unable to transmit the signal to the on-board computer, and as a result, the ignition system is unable to create a spark in the proper manner. It implies that the engine will not start at all if there is no spark, which indicates that the camshaft sensor has failed. When a newer automobile detects that the camshaft position sensor is not operating properly, it will switch to using the crankshaft position sensor in place of the old one.

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2. Check Engine Light Comes On

In several cases, the check engine light will illuminate, such as when the camshaft position sensor fails to function properly. In many situations, the sole sign of a faulty camshaft position sensor is the illumination of the check engine light on your dashboard. You should take your automobile to a mechanic if the check engine light on your dashboard comes on. The technician will scan your car for issue codes and report back to you on the situation. If you have a home OBD scanner, you can do the same thing.

3. Poor Engine Performance

It is one of the most prevalent problems that arise as the result of an inadequate camshaft position sensor, and it is the loss of significant engine power. You will notice that the engine is stopping, idling, and losing speed often. The efficiency of the vehicle falls as well.

All of these issues should be addressed as soon as possible, and they are typically caused by a malfunctioning camshaft position sensor. When you have a faulty camshaft position sensor, the engine might enter LIMP mode, which causes the engine to overheat and shut down.

4. Engine misfirevibration

In addition to engine vibrations and stalling, a bad camshaft sensor can cause engine misfires, which can result in engine vibrations while the vehicle is driving fast. If you notice that the performance of your car’s engine has decreased, and if the check engine light is illuminated on the dashboard, it is absolutely time to examine your car’s problem codes.

5. Problems with Shifting Gears

Having a defective camshaft position sensor in your automatic gearbox might cause your vehicle to malfunction and not correctly shift gears. Due to the issue code from the camshaft position sensor, the engine may be in limp mode, which might explain why this is happening.

6. Bad Fuel consumption

It is possible that reduced power as a result of the camshaft position sensor will result in increased fuel consumption. Although this is extremely unlikely when dealing with a defective camshaft position sensor, it is not out of the question. Whether you notice excessive fuel usage, you should immediately examine the problem codes to see if any codes linked to the camshaft position sensor have been stored there.

What is a Camshaft Position Sensor?

The camshaft sensor’s primary role is to operate in conjunction with the crankshaft sensor in your car to provide accurate timing information. Essentially, it’s job is to determine with extreme precision the location of the camshaft drive. As a result, it creates signals in a manner similar to that of the crankshaft position detector. It assists the engine in determining the precise time at which the first cylinder is in the top dead center position of the stroke. The information supplied by the camshaft is utilized by the engine system for a variety of functions.

The knock control is additionally supported by the actuation signal for the pump nozzle injection system, which is calibrated by the knock control.

A ring gear on the camshaft is scanned, and the rotation of the ring gear generates a change in the voltage of the Hall IC in the sensor head, which is housed in the sensor head itself.

The information obtained as a result of the alteration is read electronically and analyzed by the computerized system, which then records the information obtained.

Camshaft position sensor location

Camshaft position sensors are always put near the camshaft, frequently at the top of the valve cover, although they can also be inserted from the side of the cylinder head, which is less common.

When looking around the head or valve cover, be careful to follow any electrical cables that may be there, and you will almost certainly come upon the camshaft position sensor.

Camshaft Position sensor replacement cost

A new camshaft position sensor costs between $100 and $250 on average, depending on the brand and model. The part itself is between $75 and $120, while labor charges range between $30 and $130 per hour. A little market research will go a long way toward ensuring that you receive the greatest price for the part as well as the associated labor charges. On average, this item is not extremely expensive, with the cost of replacing a camshaft position sensor ranging between $75 and $120 for the majority of automobiles on the road today.

It is possible that the cost of replacing a premium vehicle will be significantly greater.

The labor charge will vary depending on which automobile dealership you go to.

It can be quickly and simply changed with tools that you most likely already have on hand.

Symptoms of a Bad Camshaft Position Sensor

It will greatly improve your driving experience if you are able to spot the signs of a malfunctioning camshaft position sensor. Why? Because the camshaft position sensor (CMP) measures the rate at which the camshaft rotates, it is also known as the rate sensor. The camshaft is simply a rod/shaft with protrusions that are responsible for opening and closing certain valves in an engine. A properly functioning camshaft sensor maintains track of the order in which these valves are opened and closed, and it transmits this information to the vehicle’s computer or engine management unit (ECU).

As a result, the CMP sensors in your car are critical in determining the efficiency of your vehicle’s engine and, ultimately, the quality of your driving experiences.

It is possible that the scenario will lead to potentially dangerous events, such as your car losing power in the midst of a busy highway.

How does camshaft position sensor work?

The camshaft position sensor determines the rotation of the camshaft by means of a magnet attached to the sensor. According to the location of the detecting tooth, the movement of the rotor has an effect on the direction of the magnetic field generated by the magnet. This occurs as the detecting tooth, which is connected to the timing rotor, travels back and forth between the camshaft position sensor and the timing rotor. As a result, the value of the MRE (magnetic resistance element) changes, and the camshaft position sensor receives a voltage from the engine’s ECU (engine control unit).

Along the way, the waveforms of the MREs outputs undergo varying degrees of amplification and eventually take on a rectangular shape that is influenced by a circuit included within the sensor. The engine’s ECU receives the processed MRE outputs or voltage, which it then processes further.

Symptoms of a bad camshaft position sensor

A component of your vehicle’s system, the CMP sensor will eventually fail, as will all other components of the vehicle’s system. The following are some of the signs that will manifest themselves:

Blinking check engine light

One of the most prevalent signs of a faulty CMP sensor is the appearance of the ‘Check Engine Light’ on your dashboard’s instrument panel. Having said that, this symptom is not limited to faulty CMP sensors, since a variety of other problems might cause the ‘Check Engine’ light to illuminate. We recommend that you use an OBD2 scan tool to perform a camshaft position sensor test on your vehicle’s engine. You can then determine if there is a problem with the CMP sensor based on the issue codes that you receive during the scan.

Starting issues

This is frequently a degenerative sign that emerges as a result of severe deterioration of your vehicle’s CMP sensors. The weakening of the CMP sensor results in a weakening of the signal supplied to the car’s engine as a result. After a while, the signal is no longer active. Starting becomes more difficult at this stage, and you’ll find yourself having difficulty starting every now and again at this point.

Stalling vehicle

When the CMP fails, your vehicle will experience stalling as well as backfiring and misfiring. The reason for this is that the fuel injectors are no longer receiving signals that tell them when to provide gasoline to the engine cylinders. The engine begins to stall as soon as this occurs since it has lost its ability to produce power. At this point, the engine has the option of entering what is known as ‘limp’ mode. It occurs when the automobile gets locked into a single gear and is unable to accelerate past a specific point.

Fuel system issues

The CMP sensor regulates the amount of fuel that is injected into the car’s engine’s combustion chambers. Specifically, it accomplishes this by providing signals to the vehicle’s computer, which allows the computer to regulate the amount and timing of gasoline injected into the engine’s cylinders. A failing CMP is unable to execute this function since there is no longer any pulse on the fuel injectors in your vehicle. This circumstance has an impact on the operation of the fuel system and can lead to further problems.

Acceleration issues

The problems with fuel supply produced by a faulty CMP sensor will eventually have an impact on the vehicle’s acceleration. The cause for this is that the signals given by the failed CMP sensors are either incorrect or erratic in their output. This has an impact on the timing and quantity of fuel injected, which in turn has an impact on the way the throttle reacts and, as a result, results in poor acceleration.

Transmission problems

The failure of a CMP sensor might result in transmission difficulties in vehicles equipped with an automated transmission system.

The CMP sensor in an automatic gearbox that has failed will cause the transmission to lock up and the car to not be able to shift out of first gear. This can also happen if the vehicle has been placed in limp mode.

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Decreased fuel mileage

Inaccurate readings from a failed CMP sensor might result in an excessive amount of gasoline being pumped into the engine, reducing fuel economy. Bad fuel mileage can also occur when a malfunctioning camshaft sensor delivers incorrect signals, which affects the timing of the fuel injection and results in unburned gasoline being expelled through the exhaust. It is possible for the engine’s cylinders to get too much fuel if the CMP sensors transmit the incorrect signals, which interfere with the timing and duration of the fuel injectors.

The unburned gasoline then escapes from your car’s exhaust system as black smoke, which contributes to pollution concerns.

Jerking car

It is possible for your automobile to jerk if you have a defective camshaft sensor. This occurs when the incorrect quantity of gasoline is pumped into the engine, or when the engine loses power while the vehicle is in motion. Whenever any of these scenarios occur, the automobile reacts with a jerking movement. Do you think it is safe to drive with a malfunctioning camshaft sensor now that you are aware of the signs and symptoms to look out for? So, as soon as you see any of the symptoms listed above, we urge that you take action to correct the situation.


When a camshaft is malfunctioning, it frequently emits various sounds that alert the user that something is wrong with it. Ticking, tapping, and popping noises are common when a camshaft is malfunctioning in most cases. You will also hear a lot of backfiring, which is caused by the cylinders of the automobile engine misfiring at various rates on a regular basis.

Q: What is the function of the camshaft position sensor?

Using the camshaft position sensor, a vehicle’s computer system or powertrain control module (PCM) may determine where the crankshaft drive is located at any given time. The PCM may then use this information to determine where each cylinder is located in the engine. Based on this information, the car’s computer can decide the timing and duration of the fuel injection and ignition, ensuring that the combustion process is smooth and the engine operates at peak performance.

Q: How long does it take to replace camshaft?

The time required to replace a camshaft is dependent on a number of factors. The year, make, and model of the vehicle, as well as the location of the camshaft, are all listed here. Camshafts positioned in conveniently accessible areas require less time to repair than camshafts mounted in difficult-to-reach locations on engines with complicated designs. Having said that, the process of changing a camshaft takes less than 24 hours. On rare situations, it may even be necessary to use less. It is recommended that you get the camshaft changed by a specialist who is also familiar with how to reset the camshaft position sensor following the replacement.

Q: What’s the difference between camshaft and crankshaft position sensor?

In order to determine which cylinders are firing at a given moment, the camshaft sensor maintains track of the movement of the camshaft and measures the amount of movement. The ECU receives this information about the camshaft movement and the cylinders and utilizes it to govern other engine functions such as the ignition sequences and the fuel injection system. The crankshaft position sensor keeps track of the position of the car’s crankshaft, which is responsible for driving the car’s engine by utilizing the force given to the piston during the combustion process.

This sensor is responsible for determining the engine’s relative speed as well as for establishing the ignition timing on the vehicle’s ignition system.

Q: Where is a camshaft sensor located?

It is dependent on the make and model of the vehicle as to where the camshaft sensor should be installed because various automobile manufacturers have different places for installing it. The camshaft position sensor can be located in a variety of locations, including the vicinity of the engine block, the region surrounding the car’s lifter valley, the rear of the cylinder head, or a dedicated compartment designed specifically for the sensor. The camshaft sensor, on the other hand, is often located at the top of the engine in most automobiles.

It’s possible that you’ll need to consult the owner’s handbook to determine the proper position for the sensor.

Q: How many camshaft sensors are there?

Two types of camshaft sensors are available: magnetic and Hall-effect camshaft sensors. Both types of sensors provide voltage signals to the computer in the vehicle. A digital signal is generated by the Hall-effect camshaft sensor, which requires an external power source to operate, but the magnetic camshaft sensor does not require an external power source to operate. In contrast to the Hall-effect camshaft sensor, which has three wires, the magnetic camshaft sensor has just two wiring. Modern automobiles are equipped with hall-effect camshaft sensors, which are the sensors of choice.

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Q: How much does it cost to replace camshaft position sensor

The cost of replacing a camshaft position sensor varies depending on the make and model of the vehicle, whether you want to do it yourself or hire a professional technician, as well as the location and type of business where you have it done. If you want to do it yourself, you may expect to pay anywhere from $25 to $100, depending on the vehicle. Depending on the automobile and where you have the replacement done (car dealerships and luxury cars are more expensive), you may anticipate to pay between $70 and $100 in labor charges, which is approximately the national average.

Working with professional experts who are familiar with what to do after replacing the camshaft sensor would be your best choice.

Final Words

Recognizing the signs of a faulty camshaft position sensor can be the difference between a car that drives badly, gets low gas mileage, and may even cause an accident and a car that provides a pleasurable driving experience. The symptoms associated with a malfunctioning camshaft position sensor are described in this article. If you detect any of these symptoms, we strongly advise that you consult with a medical expert as soon as possible. This will assist you in determining the nature of the problem and taking the necessary actions to resolve it.

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5 Symptoms of a Bad Camshaft Position Sensor (& Replacement Cost in 2022)

(This page was last updated on March 5, 2021.) The camshaft is a mechanism that is found in the internal combustion engine of a vehicle. The camshaft’s primary responsibility is to regulate the intake of fuel as well as the release of fumes from the exhaust system. The exhaust valves and intake valves are controlled by offset lobes that are connected to the camshaft and rotate with the camshaft. The timing belt or chain connects the camshaft to the crankshaft, and it is through this connection that the camshaft receives its drive.

Top 5 Bad Camshaft Position Sensor Symptoms

It is possible for many different things to go wrong in your car when your camshaft position sensor is not functioning properly. When these issues manifest themselves, you will be able to identify them since the symptoms will be readily visible. A malfunctioning camshaft position sensor will manifest itself in one of the five symptoms listed below.

1) Ignition Issues

If you have a defective camshaft position sensor in your car, there are a variety of problems that might arise. These issues will become immediately evident as they manifest themselves, and you will be aware of them. A malfunctioning camshaft position sensor will manifest itself in one of the five indicators listed below.

2) Difficulty Shifting

If you are driving an automatic transmission car and your camshaft position sensor fails, you may anticipate your set gear to be locked in place as a result of the failure. This implies that you will have difficulty shifting to a different gear, and you may even be unable to change at all. One of the only things you’ll be able to do is switch off your vehicle, wait a few seconds, and then turn it back on again. Please understand that this is only a temporary option to bring your car to the local technician as soon as possible.

3) Poor Engine Performance

An incorrect amount of fuel will be pumped into the cylinder chamber if the camshaft position sensor is not functioning properly. This will have a negative impact on the engine’s performance since it relies on a suitable combination of air and fuel to run properly. When you press down on the gas pedal to accelerate, you will realize that the vehicle’s performance has diminished. In many instances, you will not be able to travel faster than 30 to 40 miles per hour. It is possible that you will not only fail to accelerate, but that the car will begin to stutter and jitter around as well.

4) Low Fuel Efficiency

A faulty camshaft position sensor may result in the fuel injectors delivering an excessive amount of fuel to your cylinder chamber. More gasoline is consumed, which results in a decrease in the overall fuel economy of your car. You will notice that your gas mileage will be lowered, and that you will be filling up at the gas station more often.

5) Check Engine Warning Light

The camshaft position sensor is a component that is located within the engine’s combustion chamber. If this sensor has a malfunction or becomes faulty, it will set off a chain reaction that will damage the operation of the engine’s other components. It should come as no surprise that the ‘Check Engine’ warning light will appear on the dashboard if this occurs in your vehicle. In addition to a malfunctioning camshaft position sensor, this light might glow as a result of a variety of other issues within the engine.

Camshaft Position Sensor Replacement Cost

Are you looking for replacement components? Parts Geek has the finest pricing and choices, and we suggest them. A camshaft position sensor is one of the least expensive sensors in your car when compared to the rest of the sensors. In most circumstances, you may anticipate to pay between $20 and $100 for a new sensor, depending on your vehicle’s make and model. On top of that, factor in labor charges ranging from $60 to $90. In all, you’ll spend between $80 and $190 (+ tax) to replace your camshaft position sensor, depending on how many sensors you have.

People with even a little mechanical knowledge can usually replace the sensor on their own with the assistance of a repair manual or YouTube video that is particular to their car.

In many circumstances, getting to the sensor’s location is straightforward, but in others, it might be a significant hassle.

Symptoms of Failing Camshaft Position Sensor

Every car is equipped with a camshaft, and more recent models are equipped with a camshaft position sensor. This sensor is extremely crucial in your car’s operation since it ensures that it works properly. Our goal in this post is to provide an overview of what the camshaft position sensor is and what it performs, as well as why it is so critical. We will also discuss some of the signs that may be present when the camshaft position sensor is not functioning properly. Continue reading to find out all you need to know about your camshaft position sensor in one place.

Also, make sure to keep reading to find out what to do if your sensor stops working.

What is it

Before we dive into the specifics of probable indicators of a failed camshaft position sensor, let’s first define what it is and how it works. When you go to start your automobile, the camshaft position sensor is the sensor that tells the car’s computer what position the camshaft is in. It is located on the engine block. This is significant since the camshaft is the component of the vehicle that assists in the raising and lowering of the pistons. It also functions in conjunction with the crankshaft, and the sensor informs the vehicle of the location of the camshaft in reference to the crankshaft.

This information is necessary for the automobile to function properly; otherwise, it will not operate smoothly.


Camshaft 1. Check Engine Light– The first and most typical symptom of a failed camshaft position sensor is the appearance of a check engine light on the dashboard. This is due to the fact that the car’s computer is quite capable of determining whether or not something is functioning properly. If your vehicle’s check engine light comes on, you should utilize an OBD2 code reader to determine the cause. If you don’t have one, an auto shop will most likely be able to read the code for you as well.

  1. If the code is for the camshaft position sensor, you know that the sensor is defective or on the verge of failing.
  2. This is due to the fact that the longer you allow the problem to persist, the more harm might be done to the engine.
  3. 2.
  4. This is due to the fact that the sensor is providing incorrect information to the computer, which causes the gas to be released into the incorrect cylinders.
  5. If you are having difficulties starting your automobile and you are confident that the battery is in excellent condition, you should check the position sensor to ensure that it is functioning properly.
  6. 3.
  7. This is due to the fact that certain systems only scan specific areas of the automobile when it is turned on.

In order to prevent power loss, or faulty fuel injection, the engine must be cooled down prior to operation.

To add insult to injury, your vehicle may not jerk but rather stall.

This is extremely dangerous since it can result in a collision or a rear-end collision.

After a crash, turn on your emergency lights and try to restart your vehicle so you can pull it off the road.

Following the removal of the obstruction, you will need to have your car towed to a repair shop for inspection.

Poor Acceleration and Shifting– Another sign that the automobile is interpreting the erroneous camshaft position is poor acceleration and shifting difficulties.

In other instances, the vehicle may only be capable of reaching a specified top speed.

A problem exists if your automobile is not capable of traveling at its typical pace.

In addition to being stuck into a single gear, your vehicle might be experiencing difficulty accelerating at all.

This means you’ll be trapped in first or low gear for the majority of the year, and automobiles aren’t built to handle fast driving conditions.

Poor Fuel Mileage– The final indication that anything is amiss is poor fuel mileage.

This is due to a large amount of additional gasoline being sent into the incorrect cylinders.

Even though your automobile is capable of operating with a faulty camshaft position sensor, you should avoid doing so since it is inefficient and causes significant wear and tear on your engine.

What to do

Camshaft When a camshaft position sensor fails, the first and most obvious symptom is the appearance of a check engine light on the dashboard. The reason for this is that the car’s computer is quite capable of determining whether or not something is functioning properly. A check engine light should be on, and an OBD2 code reader should be used to determine what is causing it. A mechanic will usually be able to decipher the code for you if you don’t have one. It is your responsibility to figure out what the code signifies after you have obtained it.

  • Whenever a check engine light illuminates, it’s critical to get the codes scanned and decoded as quickly as possible.
  • To locate the code, you should use the finest obd2 scanner.
  • Ignition Problems– If you don’t receive a check engine light, the next most typical indicator of a faulty camshaft position sensor is that you’re having trouble starting your car.
  • If the improper spark plugs are being used, this might also be a source of concern.
  • When the sensor fails in the course of a drive, you may not receive a check engine light right away.
  • Car Jerking or Stalling– If the sensor fails in the middle of a drive, you may not immediately receive a check engine light.
  • While driving, you will notice jerks or lurches in the vehicle, which indicates that it is about to fail.

So, if your automobile starts acting strangely while on the road, you should probably pull over to a safe location and get it inspected.

As a result, it will simply stop executing where it is now located.

It is possible that the computer is not being instructed to inject gasoline into the cylinders, which would result in the car stalling altogether.

Alternatively, if it won’t start and the road is not congested, put the car in neutral and push it to one side.

When the automobile accelerates poorly and has difficulty shifting, this is another sign that the camshaft position is incorrectly interpreted by the computer.

Depending on the situation, the vehicle may only be capable of traveling at a set speed in some instances.

A problem exists if your automobile is not capable of traveling at its typical pace.

In addition to being stuck into a single gear, your automobile might be experiencing acceleration issues.

The consequence of this is that you will be forced to drive in first or low gear, and automobiles are not built to be driven swiftly in this year.

Poor Fuel Mileage– The final indicator that anything is awry is poor gas mileage.

A large amount of additional gasoline is being sent into the incorrect cylinders.

You should avoid driving with a faulty camshaft position sensor even if your vehicle is capable of doing so since it is inefficient and causes significant wear and tear on the engine.


So, you’ve learned everything there is to know about camshaft position sensors now. You have a good understanding of what they do and why they are so crucial. You’re also aware of the signs and symptoms of a malfunctioning camshaft position sensor. It is possible to have your sensor checked out and, if necessary, changed the next time you notice any of these indicators while driving. This will prevent harm to your engine from occurring. The need of keeping up with your automobile maintenance has never been greater, and you should now be more aware of the signs to watch for while driving that may indicate that anything is amiss.

Mike CrossLife is just too short to be driven with the standard soundtrack.

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