Receiving a P1345 code on your Chevy or GMC vehicle will read out as “Crankshaft Position-Camshaft Position Correlation”. While this error code can be caused by a faulty camshaft position sensor (CMP) or crankshaft position sensor (CPS), the issue a lot of the time relates to engine timing.
- OBD II fault code P1345 is a code used by General Motors – that is defined as “Crankshaft Position (CKP)-Camshaft Position (CMP) Correlation”, and is set when the PCM (Powertrain Control Module) on GM models detects a mismatch (correlation fault) in the input data from the Crankshaft -, and Camshaft Position sensors that exceeds a maximum allowable limit.
What does camshaft to crankshaft position correlation fault mean?
The error code P0016 is triggered when the bank 1 camshaft position sensor doesn’t match the signal from the crankshaft position sensor. This can cause various issues with the overall functioning of the engine and can lead to increased fuel consumption and rough engine idling.
What can cause a P1345 code?
Causes of Code P1345
- Faulty camshaft position sensor.
- Faulty crankshaft position sensor.
- Loose mounting hardware associated with timing sensor.
- Improper engine timing.
- Ignition Amplifier Circuit: Short to Ground (Audi/Volkswagen)
- Variable Valve Timing Sensor Issue: LH bank (Toyota/Lexus)
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.
Is there a difference between a camshaft position sensor and a crankshaft position sensor?
The main difference between the camshaft and crankshaft position sensors is that the camshaft position sensor is used to find the position of the camshaft while the crankshaft position sensor is used to detect the position of the crankshaft and piston.
What causes P0016?
The error code P0016 is triggered when the bank 1 camshaft position sensor doesn’t match the signal from the crankshaft position sensor. This can cause various issues with the overall functioning of the engine and can lead to increased fuel consumption and rough engine idling.
How do you fix code P1345?
Loose the distributor hold down bolt with engine OFF. Make sure your OBD scanner is plugged in to monitor the Cam Retard Offset reading. Turn the engine on, let it warm to normal operating temps, and get the rpm’s above 1,000. If your reading is negative, turn the distributor counterclockwise.
How do I know my crankshaft sensor is bad?
Symptoms of a Bad or Failing Crankshaft Position Sensor
- Issues Starting the Vehicle.
- Intermittent Stalling.
- Check Engine Light Comes On.
- Uneven Acceleration.
- Engine Misfires or Vibrates.
- Rough Idle and/or Vibrating Engine.
- Reduced Gas Mileage.
What is the code for a bad 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).
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.
Can I drive with a bad camshaft 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.
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.
Will crank sensor cause no 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.
What happens when your crankshaft position sensor goes bad?
Vehicle is Stalling and/or Backfiring Along the same lines as the symptom above, a problem with your crankshaft position sensor could cause your vehicle to stall and/or backfire. Stalling is more common than backfiring as the interruption of the crankshaft signal can cause the engine to be cut off.
Error Code P1345: Crankshaft Position-Camshaft Position Correlation
The Crankshaft Position-Camshaft Position Correlation error code P1345 is defined as follows: Crankshaft position-Camshaft position correlation. This error number is a manufacturer-specific fault code, which means that it does not apply to all vehicle makes and model types. As opposed to that, it only applies to select car manufacturers, such as Audi, General Motors (Chevrolet/GMC), Isuzu, Lexus, Mazda, and Toyota. There are certain differences between one make and model and another in terms of the definition, diagnosis, and repair specifications.
In addition, as previously stated, this code is a manufacturer-specific code, and each manufacturer will have somewhat different definitions and causes for this code simply because of the differences in engine architecture and the varied types of ignition triggers that are employed. Some vehicles are equipped with coil and plug configurations, while others have a single coil that serves two plugs. Additionally, some automobiles employ camshaft timing, which implies that the camshaft advances or automatically retards at a specific RPM when the engine is running.
CKS is used by all vehicles, regardless of their manufacturer, to send a signal to the PCM (powertrain control module, also known as ECM or engine control module in other vehicle makes) indicating Afterwards, the CMS (camshaft sensor) transmits a signal to the PCM indicating where the camshaft lobes are located in relation to the position of the valves opening on each of the four cylinders.
As a result, when the correlation between the CKS and CMS is more than 1 to 2 or when the CKS and CMS are out of sync, Error Code P1345 is set.
The frequent symptoms of this code are usually the same regardless of the make and model of the vehicle, and include the following:
- Stopping, rough idle, difficulty starting, engine misfire above 1500 RPM are all symptoms of a stalled vehicle.
This code, like all other codes, causes the Check Engine light to illuminate and the code to be stored in the vehicle’s memory system, much like the others.
Due to the fact that this number is manufacturer-specific, the reason behind it varies greatly from manufacturer to manufacturer. This code, for example, indicates a problem with the ignition coil power output stage 3 shorting to earth in an Audi car. This code indicates a problem with the circuit to the variable valve timing sensor on the LH bank, a problem with the sensor itself, or a problem with the PCM in the Toyota. This code indicates a misfire in cylinder 2 with a fuel cutoff, according to BMW.
A loose or malfunctioning CKS or CMS, or an ignition timing and correlation that is more than 2 apart from the CKS and CMS signal, are all possible causes. It is possible that the mechanical valve timing is incorrect.
How to Check
As a result of the fact that this code is manufacturer-specific, the reason behind it differs significantly from manufacturer to manufacturer. This code, for example, indicates a problem with the ignition coil power output stage 3 shorting to earth in an Audi automobile. A problem in the circuit to the variable valve timing sensor on the LH bank, in the sensor itself, or a malfunctioning PCM are all possibilities when it comes to Toyota vehicles. This code indicates a misfire in cylinder 2 with a fuel cutoff, according to BMW’s official definition.
A loose or malfunctioning CKS or CMS, or an ignition timing and correlation that is more than 2 apart from the CKS and CMS signal, are all possibilities.
- Broken or missing distributor hold-down bolt
- A loose CMP sensor generating variations in the sensor signal
- A broken or missing distributor hold-down bolt Distributor rotor is not properly attached to the distributor shaft. Distributor-1 tooth OFF in either the advanced or the retard settings due to incorrect installation a significant amount of free play in the timing chain and gear assembly
In the case of intermittent situations, the following factors may contribute to the problem:
- Wire insulation that has been rubbed through or scuffed through a poor internet connection
- A wire that has been broken within its insulation
How to Fix
As previously said, diagnosis and repair varies from one make and model to another, and the same is true for their repair. The following are some of the most common repairs:
- The sensor for the crankshaft position is being replaced. Ensure that the distributor has been installed correctly and make any required repairs.
This code is frequently triggered by a simple electrical connection failure or a malfunctioning camshaft sensor in the majority of situations. Additionally, loose CKS and CMS are feasible, but extremely unusual. Furthermore, unless the car has logged an extraordinarily high amount of miles, it is uncommon for the timing chain to skip a tooth. The chain tensioner can also become worn out, resulting in a significant amount of slack in the chain. It is possible that there has been a misfire or a failed sensor, in which case an extra code will appear with P1345.
P1345 crankshaft/camshaft position sensor correlation
As a ‘enhanced’ or ‘manufacturer-specific’ issue code, the P1345 cannot be read by code readers or
scan tools that only read generic OBDII trouble codes. Instead, it must be read by a code reader or scan tool that can read enhanced or manufacturer-specific codes. In the event that you have this code, DO NOT begin changing parts!
What a P1345 code means
Using data from both the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor, the powertrain control module (PCM) ensures that both shafts are where the PCM believes they should be at any given moment in time. On automobiles equipped with variable valve timing, this is extremely critical (VVT).
What is variable valve timing?
When a driver’s input for power changes, variable valve timing devices are capable of advancing and retarding the camshaft timing on the fly to maintain appropriate emissions. Valve lift systems and sprocket/phaser systems are the two most basic forms of VVT systems.
Sprocket/phaser VVT system
This approach is used by the vast majority of domestic automobile manufacturers. Two devices are used in sprocket/phaser systems. The sprocket/phaser is designed to take the position of the standard camshaft gear, which is located at the end of the camshaft. It functions in the same way as an ordinary camshaft gear in that it is connected to the timing chain in order for the camshaft to revolve. However, as the timing chain rotates the outside sprocket, a solenoid controlled oil pressure is applied to an internal cylinder, which may either advance or retard the camshaft.
The sprocket/phaser and the oil control solenoid are two important components.
The oil control solenoid is used by the PCM to manage oil pressure into the sprocket/phaser assembly.
If a PCM connects the ground side of the circuit (which opens the solenoid passages) for 5/10ths of a second and disconnects it for 5/10ths of a second, a 50 percent duty cycle may be achieved, for example.
Valve lift VVT systems
This is referred to as Honda’s VTEC system. Other Japanese and European vehicle manufacturers employ a variation of the valve rocker or valve follower lift system; this method makes use of a camshaft with more lobes than the previous system. The system may include many rocker arms for a single cylinder, depending on the configuration. Using oil pressure, the valve lift system disengages a rocker arm from its camshaft, effectively deactivating or modifying the valve open/close time for a specific valve.
What goes wrong with VVT systems?
Oil control solenoids are crucial components in any vehicle that employs the sprocket/phaser or valve lift methods of oil management. They are also the most likely components to fail. Why? As a result, the entire procedure is predicated on the premise that you have used the proper oil viscosity and that you have changed your oil according to the automobile manufacturer’s instructions. Each time the PCM instructs the oil control solenoid to perform a duty cycle, it does so with the knowledge that a specific oil viscosity at a specific pressure will advance, retard, or elevate a rocker by a specific amount.
The P1345 correlation problem code is generated as a result of this disparity.
Most cam phaser oil control solenoids fail because of sludge
Particulate matter cannot be tolerated in the intricately machined passages of oil control solenoids due to sludge in VVT oil control solenoid screenmachined passageways. As a result, they are constructed with filtering screens. The most common cause of oil control solenoid failure is clogged screens or ‘blown out’ screens as a result of unclean oil. Oil changes have a direct impact on the longevity of the oil control valve. You may believe that you are conscientious about oil changes. However, you’re overlooking the fact that oil life is determined by more than just miles.
Oil is used in all engines.
This is due to the fact that your engine may consume up to a quart of oil over that 7,000-mile timeframe, placing a significant strain on the remaining oil.
In other words, you were due for an oil change at 5,250 miles, but you continued to drive for an additional 1,750 miles on depleted oil after you reached that point.
Conditions for setting the P1345 trouble code
It is impossible for particle matter to flow through the intricatelymachined passageways found in oil control solenoids.Sludge in VVT oil control solenoid screen This is why filters screens are built into them. The most common reason for oil control solenoid failure is clogged screens or ‘blown out’ screens caused by filthy oil. Lubrication has a direct impact on the longevity of the oil control valve. Your oil changes may appear to be routine, and you may believe you are. However, you’re overlooking the fact that oil life is determined by more than just miles on the vehicle.
The oil is used in all engines.
It is estimated that burning one quart of oil in an engine that holds four and a half quarts diminishes the engine’s remaining oil life by 25 percent.
In other words, you were due for an oil change at 5,250 miles, but you continued to drive for an additional 1,750 miles on depleted oil after you reached your destination.
Symptoms of a P1345 trouble code
The check engine light is illuminated. Idle time is rough. Stalling Insufficiency of authority Engine creaking and other noises
Primary causes of P1345
The accumulation of sludge in the oil control solenoid The screen of the oil control solenoid has become clogged. A crank damper bolt that is either loose or missing.
Fix a P1345 trouble code
1) Replace the oil and filter 2). Remove the oil control solenoid and inspect the condition of the filter screen that was installed. If the socket is plugged, unplug it. If the screen is blown out or missing, the oil control solenoid should be replaced. 3). Check the resistance and voltage drop on the oil control solenoid according to the specifications in the shop manual. 4). 2018 is the year to replace the oil control solenoid. Rick Muscoplat is a professional musician. Rick Muscoplat posted a blog entry on
P1345 – Crankshaft Position – Camshaft Position Correlation (Buick, Cadillac, Chevrolet, GM, Isuzu, Pontiac, Saturn) – TroubleCodes.net
|Trouble Code||Fault Location||Probable Cause|
|P1345||Crankshaft Position – Camshaft Position Correlation (Buick, Cadillac, Chevrolet, GM, Isuzu, Pontiac, Saturn)SGC (Cam Position) Sensor Circuit MalfunctionMisfire Cylinder 2 With Fuel Cut-off (BMW)Variable Valve Timing Sensor Bank 1 Malfunction (Lexus, Toyota)|
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What Does Code P1345 Mean?
The camshaft position sensor (CMP) supplies the Powertrain Control Module, also known as the PCM, with information on the exact location of the camshaft or the timing of the camshaft. The Crankshaft Position Sensor (CKP) supplies the PCM with information about the position of the crankshaft or the timing of the crankshaft. This information is often used to calculate engine revolutions per minute. To ensure correct ignition of the spark plugs and delivery of sufficient fuel to the cylinder at the appropriate moment, it is necessary for the CMP and CKP to be synchronized or timed simultaneously.
When the voltage signal given by the CMP sensor does not fall within a predefined number of degrees of the voltage signal received by the CKP sensor, the P1345 signal will be activated.
What are the common causes of code P1345?
- Mechanical concerns with the engine – most likely with the valve timing
- It is conceivable that the camshaft position sensor has failed. It is conceivable that the crankshaft position sensor has failed. Relearning of the cam / crank sensor has not been performed – it is possible. Failure of the PCM – quite improbable
What are the symptoms of code P1345?
- The Malfunction Indicator Light is illuminated. The engine turns over but won’t start
- It’s difficult to get going, whether it’s hot or cold. While driving, the engine stalls.
How do you troubleshoot code P1345?
In the first instance, check to see whether there are any technical service bulletins (TSBs) available for your specific car. There may be an update, or a known remedy, released by the manufacturer that will save you from wasting time and money on unnecessary repairs. This is particularly true in the case of the P1345 code. After that, check to see if there are any other diagnostic trouble codes. Diagnostics should be performed on current defects first, according to the sequence in which they were stored.
- If any of these codes are present, they should be addressed first before attempting to diagnose the P1345.
- Once the connections and wires have been identified, visually check them.
- Carefully disassemble the connections and examine the terminals (the metal bits) that are located within the connectors.
- If you need to clean the terminals, you may pick up some electrical contact cleanser and a plastic bristle brush at any local parts store to get the job done.
- Use an ascan tool to delete the diagnostic issue codes from memory and determine whether the P1345 code reappears.
- Otherwise, the most likely cause of your difficulty was a problem with your connections.
- If the P1345 code does indeed return, we will need to verify the sensor and the circuits that are connected to it.
If this is the case, start the engine /attempt to start the engine and check to see if these two sensors are in sync with one another.
If this is the case, you will need to make sure that the sensors are functioning properly.
Hall Effect sensors and magnetic pick-up sensors are the two types of sensors available.
If the sensor has three wires coming out of it, it is a Hall Effect sensor.
If the sensor is a Hall Effect sensor, unplug the harness that connects the Camshaft and Crankshaft Position Sensors to the engine.
If the sensor does not get 5 volts, the cabling from the PCM to the sensor should be repaired, or the PCM may be faulty.
If the sensor does not get 5 volts, the cabling from the PCM to the sensor should be repaired, or the PCM may be faulty.
Connect a test light to a 12V power source and connect the other end of the test light to the ground circuit that runs to each of the sensors.
After confirming that the test light is on, wriggle the wiring harnesses connecting each sensor to determine whether the test light flickers, suggesting an intermittent connection.
We will put it through its paces in the following areas: Resistance is the first step.
Check the resistance and make sure it matches the standards for your car, which are normally 750 – 2000 ohms in resistance.
This indicates that the sensor has an internal short to ground if you receive any readings other than infinite or zero.
Connections: Reconnect the two leads from your DVOM to their corresponding connections on the Camshaft/Crankshaft Position Sensor.
The a/c voltage output on yourDVOM should be read while the engine is being started up.
Generally speaking, a decent rule of thumb is 5 volts alternating current When using a scan tool to replace the sensor, remove the diagnostic issue codes from the tool’s memory and check to see if this code appears again.
If the P1345 code does return, use a dual trace lab scope to check the signals from the Camshaft and Crankshaft Position Sensors to determine if they are out of sync.
More information may be found in the service manual if needed.
If you are doubtful, get advice from an automobile diagnostician who has received specialized training. And keep in mind that if a PCM is determined to be the source of the problem, it must be programmed or calibrated to the vehicle in order to be fitted properly.
Codes Related to P1345
A general designation for the CKP sensor is P0335, which stands for Crankshaft Position Sensor Malfunction. P0340 – Camshaft Position Sensor Malfunction -a general code for the CMP sensor that can be seen in many applications.
Other Manufacturer Specific Definitions for P1345
Correlation between the crankshaft position and the camshaft position (GM) Circuit failure with the variable valve timing sensor on the left hand bank (Toyota) Primary circuit 3 of the ignition amplifier is shorted to ground (Volkswagen) Primary circuit 3 of the ignition amplifier is shorted to ground (Audi) Lower-level radiator ventilation is affected by an electrical failure (BMW) Correlation between the crankshaft position and the camshaft position (Buick) Signal fluctuation between the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor (Cadillac) Correlation between crankshaft position (CKP) and camshaft position (CMP) (Chevrolet) Sensor range and performance of mass air flow (MAF) sensors (Dodge) Sensor range and performance of mass air flow (MAF) sensors (Freightliner) 5 ION Line Is Now Open (Hyundai) A problem with CKP/CMP signals has occurred (Isuzu) There is no signal from the camshaft position sensor (Kia) Incorrect operation of the variable valve timing sensor in the LH bank (Lexus) Signal failure on the camshaft position (CMP) sensor (Mazda) Misfire Cylinder 2 in conjunction with a fuel cut-off (Mini) Signal fluctuation between the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor (Oldsmobile) Correlation between the crankshaft position and the camshaft position (Pontiac) Correlation between the crankshaft position and the camshaft position (Saturn)
BAT Team Discussions for P1345
- Electrical trouble and stalling in a 1998 Seville Wow! Donations are much appreciated! Without them, it is quite unlikely that this site would be able to continue to operate for the benefit of all of us, and we are always willing to go the additional mile to assist individuals who contribute to this site’s continued operation. As for the stalling issue, if the engine is going good – lovely and smooth and everything – and suddenly j
- Need Help, then the fault is with the transmission. This was something I came across once, except it was in an Astro Van. The engine and distributor are the same as before. The pickup/cam sensor is used in this distributor. According to the code, we modified the cam position/pick up module in the distributor, and then re-aligned the system at the customer’s request. The code was the same two weeks later. 98 GMC ignition problem350 engine only after pulling the plug. I had the ign module examined, and it came back clean. Although I attempted to get it in there when it was still hot, I believe it may have cooled off by the time they got around to testing it. I am not sure why I continue to have this suspicion. The engine is completely stock. I installed a new distributor around 2 years ago and have been experiencing Vortec timing issues ever since. I have a 1998 GMC 350 Vortec, and I had to repair the intake manifold because it was leaking (cracked). My timing was the same as the previous 350s, and it appears to be running OK. The check engine light is up, so I scanned it and discovered a problem with the cam shaft / crank shaft correlation (P1345). I adjusted the cam to tdc on the compression stroke and the rotor to 1. When I look up p1345 in the manual, it says 1996 GM 1 ton with 7.4-liter engine. Is this correct? Because the timing chain is failing, the book states that the camshaft to crankshaft coordination is failing. Has anyone else experienced this issue before? The rotor’s checked bushings appear to be in good shape
P1345 Chevy: Crankshaft position- camshaft position correlation
The items and services that we write about are chosen by our editors. If you make a purchase after clicking on one of our links, we may receive a commission. Vehicle owners who are not technicians share a key problem in common: the difficulty in removing some diagnostic trouble codes (DTCs) from their vehicles. The P1345 diagnostic trouble code is unquestionably one of these Diagnostic Trouble Codes.
This article will go into great detail on the P1345 code found on General Motors (Chevrolet) automobiles.
The good news is that this information is transportable and will assist you in repairing your Chevy.
If you are a little bit handy, you will be able to solve the problem yourself at the very end of the process.
P1345 Chevy definition and meaning
Code for troubleshooting P1345 is a manufacturer-specific code that denotes the association between the crankshaft position and the camshaft position on General Motors cars.
It is important to note that because P1345 is a manufacturer-specific DTC, diagnosing it will be different for various manufacturers. Furthermore, the code may only be applicable to particular automobiles, such as those manufactured by Audi, Isuzu, Toyota, BMW, General Motors (Chevrolet and GMC), Lexus, Mazda, and Volkswagen. The P1345 code on a Chevrolet or GMC truck will differ from the same code on a different automobile brand. Using the table below, you can see how the code is defined differently on various cars, as opposed to the P1345 code for GM vehicles.
- The type of engine and ignition triggers utilized in each unique car, as previously indicated, determines the codes that are shown.
- It is a sensor in your car that measures the position of the camshaft.
- The Engine control module (ECM) will then utilize this information to determine the optimal timing for the fuel injectors in the engine.
- These two sensors, in conjunction with the engine control module, are responsible for controlling engine timing.
- It is possible to record the error code P1345 if there is an out of sync relationship between the camshaft position sensor and the crankshaft position sensor for more than 1 or 2 degrees.
- In recent automobiles, the timing is automatically adjusted by the engine, eliminating the need for this misunderstanding.
List of OBD2 codes that relate to P1345 on Chevy
1. P0335 – Misconfiguration of the Crankshaft Position Sensor ‘A’ Circuit 2. P0340 – A fault in the Camshaft Position Sensor ‘A’ Circuit.
Symptoms of P1345 on Chevy?
1.Check engine light ‘ON’ – like with other codes, this one will cause the ‘check engine’ light to illuminate and will be kept in the vehicle’s memory system, just like the others. Having an engine misfire at or above 1500rpm indicates that the distributor is malfunctioning and there is insufficient electricity to light the spark plugs. 3.Engine misfires below 1500rpm indicates that the ignition coils are malfunctioning. A misfire is the outcome of this situation. When traveling at faster speeds, the ECM is more likely to attempt to alter valve lift.
Rough idling and stalling while driving are two symptoms of an engine problem.
4.Difficulty in starting the engine– An engine with bad timing will have difficulty starting up since the timing of the engine is critical to the operation of the engine. Newer automobiles have improved on this by allowing the engine to time itself automatically.
Causes of P1345 on Chevy?
camshaft position sensors and crankshaft position sensors that are defective or not working properly 1. (highly unlikely) If the p0335 and/or p0340 codes are also recorded, it is possible that the CKS and CMS are malfunctioning. In this case, a fast option would be to replace the sensors or have them repaired by a mechanic. However, if these two codes are not there, the problem will be found somewhere else. 2.A valve timing chain that is stretched, slid, or poorly placed It is possible that there is excessive free play in the valve timing chain and gear assembly, resulting in the valve timing being out of synchronization.
Correct distributor location, or a loose distributor rotor on the distributor shaft, are among the most common problems (most likely) The distributor is responsible for transferring current to the ignition coils, which then ignite the spark plugs.
Simple electrical connection problems are caused by faulty wire connections, which is number four.
These sorts of electrical issues should be examined on a regular basis as part of routine maintenance.
How serious is the P1345 Chevy OBD2 code?
Even while you may be able to get away with not addressing this error number for a time, it is not recommended. The engine will have difficulty starting on a number of occasions, and it may even abruptly shut down completely. These two circumstances are not suitable for any driver’s comfort level. Furthermore, the check engine light may wind up being illuminated until the problem is resolved.
How to diagnose and fix the code P1345 on Chevy?
1. A scan tool for the OBD2. 2. a cleanser for electrical appliances 3. A brush with plastic bristles 4. Dielectric silicone grease is a kind of silicone grease that has dielectric properties. 5. Volt-Ohm meter with digital display (DVOM)
We’re going to be looking at a 5.7-liter Vortec engine in this article. You’ll need to see whether there are any technical service bulletins (TBS) available for your particular car. If the manufacturer has released a cure for this specific problem, you may be able to save both time and money as a result. 1st and foremost, you will require an OBD scan tool in order to connect to your vehicle’s OBD port. Make use of it to search for all of the saved codes to guarantee that you diagnosis all of the other codes before the P1345 appears on the screen.
- Visually inspect the electrical connections surrounding the CKS and CMS sensors for corrosion, burnt-out wires, or other defects.
- If they are rusted or burned, you will need to clean them using an electrical cleaner and the brush mentioned above before continuing.
- Before returning the sensors, apply a thin layer of dielectric silicone grease to the terminals.
- Inspect the CKS and CMS sensors for any damage or defects, both on and around the sensors.
- You will need to utilize a Digital Volt Ohm Meter to determine whether or not the sensors are functioning properly (DVOM).
- If this is the case, the problem must be somewhere else.
By modifying the installation, you can resolve the issue.
If this does not resolve the issue, the final and most conclusive diagnosis will be that there is a problem with the distributor.
It is in charge of ensuring that electricity is delivered to ignition coils in the proper firing order and for the appropriate time duration.
On top of that, the gear within the distributor may be malfunctioning as well.
Start the engine by pressing the start button.
If this is not the case, you will have to modify the distributor.
Connect the scan instrument to the computer and keep an eye on the ‘Cam Retard Offset’ value.
Continue until the ‘Cam Retard Offset’ measurement is within +/- 2 degrees of zero, at which point the problem will be resolved. Continue reading:How can I do CASE relearn without the use of a scan tool?
Tips to avoid P1345 in the Future
1. Preventive maintenance should be performed on a regular basis. Problems associated with P1345 will be identified earlier. Drive carefully through puddles because water can get into the distributor cap and cause it to short out.
How do I know that the distributor is not the source of the P1345 problem? If other codes, such as p0335 and p0340, are stored, there is a significant possibility that the problem is not with the valve timing and its components, but instead with something else. In what range does the expense of diagnosing the P1345 Chevrolet code fall? Depending on where you take your car for repair, the costs may vary accordingly. The rates range from $75 and $150 per hour on average, depending on the situation.
- What happens if none of the alternatives given above are successful in resolving the issue?
- However, if the problem persists or if you experience additional problems such as the engine failing to start or misfiring, you may have a problem with another component.
- From then, it’s up to you.
- This solution is only applicable to General Motors and Chevrolet automobiles.
- What should I do if I have the P1345 error number but the engine is still operational?
- Bring your automobile in for maintenance so that it may be fixed as quickly as possible.
- camshaft: A definitive guide
P1345 Camshaft to Crankshaft correlation faulty
The P1345 code and cylinder one are unaffected by this. My 1996 Sierra 7.4 Vortec, which had about 300,000 miles on it, developed a problem with the catalytic converter. It comes with new lifters, rods, cam, sprockets, chain, oil pump, stater, crank chaft sensor, cam shaft sensor, disributor cap, plugs and wires, and other components, among other things. While it is unclear whether this was caused by an engine fault relating to this code, I have been informed that if I do not address this code issue, a new converter may be wrecked.
- A malfunctioning converter is suspected, as clogging up the converter causes back pressure, which finally causes it to completely bog down and shut off.
- I’ve heard clanking and banging under the vehicle on two separate occasions.
- In the event that this were a ‘TIMING ISSUES,’ wouldn’t the bike ride rough all of the time and not so smoothly when I first start it?
- QUESTION2: What would cause the engine to operate smoothly if the spark plug wire was removed from the engine?
HOW? The catalytic converter will be replaced once the code problem has been successfully resolved. The most recent revision was made on:
P1345 Code: Manufacturer-Specific Issue (Symptoms, Causes, and Fixes)
The most recent update was made on September 3, 2021. For efficient functioning, today’s automobiles rely significantly on the usage of very complicated data transmission networks, which are extremely difficult to maintain. A vehicle’s different modules connect with one another over these networks, which streamlines the functioning of many systems on a vehicle. Are you looking for a reliable online repair manual? The top five choices may be found by clicking here. Although this technology may be useful in a variety of situations, it is particularly useful when a vehicle shows atypical symptoms, which can be caused by a variety of mechanical or electrical faults.
You will receive a list of active fault codes as a result of this action, which you may use to aid you with the diagnostic operation.
P1345 is a diagnostic trouble code (diagnostic fault code) that is frequently misunderstood.
Continue reading to find out more about the core cause of DTC P1345, as well as how to proceed if you ever encounter this issue again in the future.
What Does Code P1345 Mean?
P1345 is an OBD-II trouble code that has a description. Ignition Amplifier (Audi/VW) – Short to Ground Position Correlation of the Crankshaft and Camshaft on Chevrolet/Buick/GMC/Cadillac vehicles Vehicles manufactured by Toyota or Lexus: Variable Valve Timing Sensor – Circuit Failure The Mazda:Camshaft Position Sensor has a signal failure. In contrast to many other diagnostic issue codes, fault code P1345 is not a general error code. This DTC, on the other hand, is manufacturer-specific, which means that it is only recognized and utilized by particular makes and models of automobiles.
- DTC P1345 is a diagnostic trouble code that is predominantly used by General Motors (Chevy, GMC, Cadillac, and Buick), Audi/VW, Toyota/Lexus, Mazda, and Isuzu.
- In the vast majority of situations, the vehicle’s ECM/PCM has decided that the data obtained from these sensors is unreasonable when compared to the data received from its equivalent.
- When comparing the crankshaft position sensor with the camshaft position sensor, the former records the rotational speed of the engine’s crankshaft, while the latter records the articulation of the individual lobes of the camshaft.
- A vehicle’s management software has decided that the signals from these two sensors are not in accord with one another, which results in the DTC P1345 being displayed.
- In addition, the DTC P1345 may have a somewhat varied meaning depending on the vehicle’s make and model.
Audi and Volkswagen, on the other hand, claim that DTC P1345 indicates a short to ground situation inside the ignition amplifier circuit of the vehicle under consideration. Code P0016 and Code P0017 are related codes.
Symptoms of Code P1345
It is common for the specific symptoms associated with fault code P1345 to differ from one particular make and model to another. However, in the majority of cases, a specific set of symptoms seems to be more prominent than others. Listed below are the most often seen symptoms associated with DTC P1345.
- Engine stalling
- Difficult starting
- Poor idle
- Erratic/misfire at high RPM
- Check engine light illuminated
Causes of Code P1345
The specific reason of diagnostic issue code P1345 might differ significantly between different vehicle makes and models, making it difficult to pinpoint. Some reasons, on the other hand, seem to be significantly more prevalent than others. The following are some of the most prevalent reasons of DTC P1345 that you may encounter.
- A malfunctioning camshaft position sensor
- A malfunctioning crankshaft position sensor Improper engine timing is caused by loose mounting hardware linked with the timing sensor. Circuit of the ignition amplifier that is shorted to ground (Audi/Volkswagen)
- Toyota/Lexus Variable Valve Timing Sensor Problem on the LH bank
Is Code P1345 Serious?
It is generally agreed that DTC P1345 is an extremely significant error code to encounter. That’s because some of the symptoms linked with this code have the potential to impair the driver’s ability to operate his or her car while driving. The most significant of these symptoms is stalling, which may be quite dangerous while driving in the normal flow of traffic, especially when attempting to drive against the flow of traffic. If DTC P1345 is present, it is imperative that it is diagnosed and repaired as soon as possible and for no longer than absolutely required.
If you are not confident in your ability to complete such repairs on your own, or if you just do not have the time, make an appointment with your local service facility as soon as possible.
How to Fix
Due to the fact that diagnostic problem code P1345 is manufacturer-specific in nature, the repair techniques for this error vary significantly from one vehicle to the next. The following steps, on the other hand, will give you with a broad framework for making a diagnosis.
1 – Identify Additional Codes
It is critical to identify and examine any other codes that may be present before proceeding with the diagnostic process. Make a thorough diagnosis of each of these additional codes, paying close attention to any possible correlations with DTC P1345.
2 – Search For Pertinent Service Bulletins
It is also a good idea to look for any service bulletins that may be available that address fault code P1345, if it applies to your particular car. If such service bulletins are available, they will very certainly put you in the direction of the fundamental problem with your car.
3 – Perform Thorough Visual Inspection
It will now be required to conduct a comprehensive visual check of anything that has anything to do with the engine’s timing sensor circuits. Check both the camshaft position sensor and the crankshaft position sensor, as well as the wiring that is connected to each sensor, thoroughly. Check to verify that both sensors are properly placed and that all wire connections are secure before proceeding.
4 – Consult Factory Service Literature
If no obvious problems have been discovered, it is recommended that you check the vehicle’s service documentation.
The manufacturer of your car will supply you with step-by-step instructions for diagnosing the problem at hand if you follow the manufacturer’s instructions.
DTC Decoded: P1345
P1345 is the diagnostic code. Make:Chevrolet Code: Position of the Crankshaft or Correlation of the Crankshaft Position Code detection: The ECM has detected that the sensor locations to the camshaft or the crankshaft are out of sync with the rest of the engine. Symptoms associated with this code include:
- It’s difficult to get the engine to start. In the middle of the road, the engine dies. After a while, the service engine light turns on.
What is the source of this error code?
- The sensor that determines the position of the camshaft is faulty. The sensor that determines the position of the crankshaft is faulty. Because the valve timing is wrong, this is a mechanical issue of the engine. A loose mounting bolt holding the sensor to either the camshaft or the crankshaft is present.
What the experts have to say:If this code comes on after internal engine repairs, you should have the engine checked to make sure you have the right mechanical timing in place.
- It is recommended that you examine the engine to verify that you have the right mechanical timing if this code was activated after internal engine repairs were performed.
What the experts have to say:If this code comes on after internal engine repairs, you should have the engine checked to make sure you have the right mechanical timing.
P1345: Powertrain DTC: Camshaft to Crankshaft Position Correlation Fault Condition (GMC/Chevrolet)
Because of the variety of automobile manufacturers, Trouble Code P1345 might imply something somewhat different for each kind of vehicle. The main distinctions between the manufacturers are the ways in which they define the code in their products. In most cases, the trouble code P1345 indicates that there is a problem with the vehicle’s ignition system. P1345, on the other hand, indicates that the crankshaft sensor position or the camshaft sensor position were not properly timed in a GMC or Chevrolet.
- Most commonly, a defective crankshaft position sensor, a poor camshaft position sensor, a loose crankshaft position sensor, a loose camshaft position sensor, or an engine problem with the timing of the valve are to blame.
- Engine stalls, the Check Engine light on, and difficulty starting the engine are all indications you’ll experience before the problem occurs.
- A regular stream of information is received by the powertrain control module from the camshaft position sensor and the crankshaft position sensor.
- Because of this, it generates the error code P1345.
- They also make certain that the spark timing is correct.
- It is advised, however, that you get a competent technician to complete the work for you.
- The failure to address this issue quickly and effectively might result in irreversible damage to your engine and perhaps some of its associated components.
- A Diagnostic Trouble Code (DTC) is a code that indicates that the crankshaft position A and camshaft position correlator are not in sync (Bank 1).
If you’re lucky, all you’ll have to do is tighten the connection of one or both of the sensors to fix the problem.
However, in the majority of situations, the problem is caused by a faulty sensor or a faulty electrical connection. Although it’s unlikely that the timing chain or chain tensioner would be the source of the problem, don’t rule them out when attempting to figure out what’s going wrong.
P1345 Chevrolet GMC Audi Code
The P1345 DTC code is a powertrain diagnostic problem code that is particular to the manufacturer (DTC). The procedure for repairing a vehicle differs based on the brand and model.
OBD-II Trouble Code Technical Description
Don Bowman contributed to this article. ASE (American Society of Automotive Engineers) Certified Automotive Technician Audi: Primary circuit 3 of the ignition amplifier is shorted to ground. Camshaft-to-crankshaft position correlation fault condition in General Motors (Chevrolet/GMC). Isuzu: CKP/CMP signals are not functioning properly. Lexus: Circuit failure with the variable valve timing sensor on the LH bank. a malfunctioning signal from the camshaft position (CMP) sensor on a Mazda Toyota: Circuit failure with the variable valve timing sensor on the LH bank.
- There are several possible definitions for this code, and each manufacturer has their own.
- Because of the differences in engine design and the different types of ignition triggers utilized by different manufacturers, it is probable that each manufacturer will have a unique set of causes for the problem.
- Some automobiles feature variable camshaft timing, which adds to the complexity of the situation.
- Crankshaft sensors (CKS) are used in all cars to communicate to the electronic control module (ECM) the location of the crankshaft relative to top dead center (TDC) during the compression stroke of the number 1 cylinder on the compression stroke.
- This signal is utilized by the ECM to calculate the optimal timing for the fuel injectors.
Symptoms of a P1345 error code include the following:
- Engine misfires at 1500 RPM
- Difficulty starting
- Rough idle
- And stalling
This code varies greatly from manufacturer to manufacturer. Toyota, for example, indicates that a malfunctioning circuit to the variable valve timing sensor on the LH bank, the sensor itself, or an ECM failure are to blame. Audi believes that there is a short between the ignition coil power output stage 3 and the ground. General Motors (Chevrolet, GMC, and other brands) proposes a number of probable explanations. The following are examples of possible causes: the valve timing chain has slipped or has been installed incorrectly, either the CKS or CMS has come loose or is defective, the ignition timing and correlation has exceeded 2-degrees of separation between the CKS and CMS signal, and the ignition timing and correlation has exceeded 2-degrees of separation between the CKS and CMS signal.
According to BMW, the code indicates a misfire in cylinder number 2 that has resulted in a fuel cutoff.
- The first thing you should do is obtain a repair handbook for your vehicle. Obtain all of the technical service bulletins (TSBs) that are associated with this code by searching the web for them. In terms of the complaints received by the service department, as well as the types and natures of system failures, the technical service bulletins serve as a representative sample. Use a standard OBD II code scanner and connect it to the vehicle’s OBD port. Start the engine by turning on the ignition switch without turning on the engine. Press the ‘Read’ button and make a note of all the codes that appear. Notate the TSB-related reasons of this code as well as the repair strategy that is suggested. The process may be found in the service handbook. It will walk you through the process of diagnosing the problem, identifying the necessary tools, and performing the repair step by step.
The majority of the time, I’ve discovered that this code is caused by a faulty electrical connection or a faulty camshaft sensor throughout the years. It is possible, but extremely improbable, that the CKS or CMS have become loose as has been hypothesized. The likelihood of a timing chain jumping a tooth is quite low, unless the vehicle has a very high mileage. The chain tensioner wears down over time, resulting in a significant amount of slack in the chain. If a sensor fails or a misfire is detected, an extra code will be shown alongside code P1345, which will help to pinpoint the cause of the problem even more precisely.
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