P0141 Oxygen sensor Chrysler products?

Fix code P0141 Oxygen sensor Chrysler products This trouble code indicates that the computer has detected a problem with the heater in the oxygen sensor located after the catalytic converter.


  • Fix code P0141 Oxygen sensor Chrysler products P0141, 02 Sensor Heater Circuit Malfunction, Bank 1 Sensor 2, Dodge Grand Caravan and Plymouth Voyager van. This trouble code indicates that the computer has detected a problem with the heater in the oxygen sensor located after the catalytic converter.

How do I fix error code P0141?

What repairs can fix the P0141 code?

  1. Clearing the fault codes and performing a road test to try and verify a failure.
  2. Replacing the O2 sensor for bank 1 sensor 2.
  3. Repairing or replacing the wiring or connection to the O2 sensor for bank 1 sensor 2.
  4. Replacing the fuse to the heater circuit for the O2 sensor heater circuit.

Can I drive with a P0141 code?

Minor. There is no immediate danger to the car, nor will this code leave you stranded on the side of the road waiting for a tow. There is time to look for a good mechanic and plan a date to drop off the car.

What does fault code P0141 mean?

Code P0141 occurs when the powertrain control module tests the downstream heated oxygen sensor’s heater circuit on Bank 1 and detects a short in the circuit or excessive resistance in the heater circuit.

What code is bank 1 sensor 2?

Error code P0141 is described as Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2). This means there is a problem on the O2 sensor on bank 1, and it fails to decrease the time needed to enter closed loop.

What causes code P0138?

When trouble code P0138 is set, this indicates that there is a high voltage (steadily above. 9 volts) for more than 10 seconds indicating a lack of oxygen in the exhaust stream and an abundance of fuel at sensor 2 on the bank 1 of the engine.

Is there a fuse for oxygen sensor?

Is there a fuse that controls O2 Sensor, Bank1/2 Whats voltage heater circuit. when the light re appears that quickly, there is an electrical issue. yes, there is a fuse for the o2 heaters.

Is P0141 serious?

A P0141 code is among the least serious engine codes you can have. No matter the underlying issue, a P0141 code will never progress to a more serious engine issue. However, the most significant concern in leaving a P0141 code unaddressed is that the check engine light will always stay on.

What is P0135 code?

Code P0135 occurs when the powertrain control module tests the upstream heated oxygen sensor’s heater circuit on Bank 1 and detects a short in the circuit or excessive resistance in the heater circuit.

How do you test an oxygen sensor on a car?

Test the Oxygen Sensor Response to a Lean Fuel Condition

  1. First, disconnect the hose from the positive crankcase ventilation (PCV) valve leading to the intake manifold. This will allow more air to enter the engine.
  2. Check the sensor’s signal voltmeter reading.
  3. Reconnect the hose to the PCV valve.

Where is oxygen sensor located?

The sensor is typically located on the passenger side of the car, mounted directly onto the exhaust pipe near the catalytic converter. When the sensor goes bad, your car may lose up to 40 percent of its fuel efficiency, because your car will use too much gas.

What does ho2s mean?

The HO2S2 ( heated oxygen sensor 2 ) sensor calculates the air to fuel ratio of the vehicle’s exhaust.

Can bad O2 sensor cause rough idle?

If your vehicle has a bad oxygen sensor, it could run irregularly or sound rough when it idles. A faulty oxygen sensor can impact your engine’s timing, combustion intervals, and other essential functions. You could also notice stalling or slow acceleration.

Can you clean an O2 sensor?

There are no true oxygen sensor cleaners that are safe to put through your engine. While some people choose to remove them and use a wire brush or an aerosol cleaner to remove deposits, we do not recommend trying to clean O2 sensors.

P0141 Code: O2 Sensor Issue (Symptoms, Causes, and How to Fix)

The most recent update was made on January 4, 2022. When the check engine light illuminates on your automobile, your heart skips a beat. However, if you receive a P0141 error number, you are likely to take a big breath. Why? Because P0141 is an emission code, and if you don’t have the money to remedy it right away, you may most likely postpone the repair for a long without encountering any complications. Are you looking for a reliable online repair manual? The top five choices may be found by clicking here.

But what precisely is a P0141 error code, and how do you go about repairing it?

What Does Code P0141 Mean?

Troubleshooting OBD-II Code P0141 – Descriptive Information Circuit for the O2 Sensor Heater The term “O2 sensor heating circuit” refers to the electrical circuit that your vehicle’s oxygen sensor is powered by. That specific circuit’s reading is outside of the typical range, and this message is informing you of that fact. While it is possible that this is due to an underlying problem with your catalytic converter, it is also possible that the oxygen sensor is delivering incorrect values to the computer.

Take a look at these more resources: Coding sequences: P0030, P0031, P0133, P0161, and Code P0030.

Symptoms of Code P0141

If you have a code P0141, it’s likely that you didn’t notice anything else other than the check engine light on. That’s because a P0141 is an emissions code, and unless you’re having your vehicle inspected for emissions, you’re unlikely to detect anything wrong. Furthermore, if the problem is caused by a broken oxygen sensor, the only thing that will cause you to fail the emissions test is the code that was generated. This is due to the fact that the oxygen sensor’s only function is to give current emission data.

The only true symptom of DTC P0141 is a check engine light, however if you chance to take your car to the local DEQ or other emissions testing station, you may see two more symptoms.

  • The presence of a check engine light. Failure to pass the emissions inspection NOx emissions are at an all-time high.

Causes of Code P0141

A malfunctioning oxygen sensor is by far the most prevalent reason for a P0141 signal to be shown. After around 60,000 to 90,000 miles, oxygen sensors in your vehicle need to be replaced. Meanwhile, the catalytic converter, which is the second most likely component to fail, normally lasts 100,000 miles, though it is not rare for them to last as long as 150,000 miles in some cases. Furthermore, if the catalytic converter is the source of the problem, you will most likely notice a rotten egg stench emanating from the rear of your car.

P0141 codes are frequently caused by exhaust leaks that occur before the oxygen sensors, a malfunctioning catalytic converter, and wiring difficulties, among other things.

  • A malfunctioning oxygen sensor
  • A catalytic converter that isn’t working properly
  • Before the rear oxygen sensor, there is a leak in the exhaust. Wiring or connections that are faulty

Exhaust with a straight pipe is also available (Pros and Cons)

Is Code P0141 Serious?

A P0141 engine code is one of the least dangerous engine codes that can be encountered. It doesn’t matter what the underlying problem is; a P0141 code will never proceed to a more significant engine problem. In any case, the most major risk with leaving a P0141 code ignored is that the check engine light will remain illuminated at all times. While this may not appear to be a major issue at first, if another underlying issue arises that causes the check engine light to illuminate, you will have no way of knowing that more than one code is present in your vehicle.

How to Fix

A P0141 engine code is one of the least serious engine codes that may be encountered in a vehicle’s engine. P0141 codes will never proceed to a more significant engine problem, regardless of the underlying cause. If you leave a P0141 code unattended, the most serious risk is that the check engine light will be illuminated all of the time. At first glance, this may not appear to be a significant issue; but, should another underlying issue arise that would cause the check engine light to illuminate, you will have no way of knowing that more than one code is present.

  1. First and foremost, pay attention to the sound of your automobile starting up. When you drive a four-cylinder Honda (or anything similar), it may sound like you’re driving a hotrod because you have an exhaust leak. An exhaust leak, regardless of whether or not you drive a noisier vehicle, makes a distinct sound that sounds like a rumble from the back of your vehicle. Before you replace any sensors, you must first repair the exhaust leak. Second, double-check that the oxygen sensor wire is in good condition and that the sensor is properly connected to the computer. Despite the fact that it may seem evident, it is not unusual for the wires of an oxygen sensor to get corroded and exhibit visible indications of wear.

If, on the other hand, everything is in fine working order and the problem persists after you replace the oxygen sensors, you will most likely require a new catalytic converter. In addition to being slightly more expensive, catalytic converters generally last between 70,000 and 130,000 miles on average.

What Can Cause a P0141 Code ❤️ Here’s All What You Need to Know!

Internal computer errors are used by your vehicle’s internal computer to draw your attention to faults with its internal components, which are then corrected. Some of these issues may be trivial and readily remedied, whilst others may be more sophisticated and tied to internal flaws in the measurement process, and so on. Considering the high cost of auto repairs, automotive professionals advise you to never disregard any error codes that appear on your vehicle’s dashboard. In certain cases, catching a problem early on might save you hundreds of dollars in repair expenditures over time.

One of the oxygen sensors in one of the cylinders is malfunctioning, which is the primary cause of this fault code.

Please keep in mind that the P0141 error number is one of those that prevents your car from passing the emission test.

In what situation does the P0141 OBD2 problem code occur? To understand the significance of the P0141 issue code, it is first necessary to understand that it is a member of a large family of codes that are all linked together. Some of these Error codes are as follows:

  • P0161 indicates that there is a problem with the sensor heater circuit bank two sensor 2
  • P0135 indicates that there is a problem with the O2 sensor heater circuit bank one sensor one
  • And P0161 indicates that there is a problem with the sensor heater circuit bank two sensor 2. The code P0155 indicates that there is an issue with the O2 heater circuit bank two sensor one

When the P0141 OBD 2 trouble code is activated, the principal definition states that there is a problem with the O2 sensor heating circuit malfunctioning (bank one, sensor 2). While this description may make perfect sense to expert technicians, it may be a bit difficult for average drivers to comprehend unless it is conveyed in a more straightforward manner using simpler language. The most basic explanation of this error code is that your vehicle’s engine control module, also known as the ECM, has identified a problem with the bank one sensor two oxygen heater circuit and has initiated a diagnostic procedure.

It’s vital to note that if you’re still unsure about what a P0141 error code signifies, it’s a mix of two important things:

Bank 1

Understand where your vehicle’s bank one is located because the location can vary depending on the make, model, and year of your vehicle’s engine and transmission. The bank one cylinder, for example, is located right next to the driver’s side in Chevy and Dodge pickups because the first cylinder is located at that location. Ford pickups, on the other hand, have the bank of cylinders located next to the passenger side because their first cylinder is in the reverse order of the others. As a result, automotive experts recommend that you read through your vehicle’s manual and become familiar with the location of the bank one in order to avoid having to replace the faulty component.

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The next stage is to determine the location of sensor two, which may be done once bank one has been discovered. As a result, it is frequently referred to as the oxygen sensor because it is responsible for detecting oxygen levels. Some automobiles have it directly in the centre of the catalytic converter, which is where it should be. Other cars may have a since or two behind the catalytic converter on the side opposite the engine, depending on the manufacturer. It’s critical not to make a distinction between the two since she has to answer one of them.

  • If you are unable to discover the correct sensor, you will waste your time and effort attempting to repair a perfectly functional sensor that will not take you anywhere.
  • As the name implies, these oxygen sensors are in charge of detecting the amount of oxygen present in the exhaust gas that finds its way to the engine after passing through the catalytic converter.
  • Knowing the proper amount of oxygen entering the engine is extremely important and key information in the combustion system.
  • Failure to maintain the proper air-fuel mixture can have a negative impact on the performance of the engine and, in some cases, can result in a reduction in overall engine operation and efficiency.
  • The upstream sensor is in charge of sensing the quantity of oxygen entering the engine, which has a direct impact on determining the amount of air and fuel mixture present in the engine.
  • The heater circuit in the downstream sensor is continually monitored by your computer, which is connected to the internet.
  • What is the significance of heat to the oxygen sensors?

Because the entire process is based on temperature differences in emission temperatures, these oxygen sensors will not function below a particular temperature threshold.

There are normally two primary wires that link the oxygen sensor to the heater, one of which is responsible for receiving a specific charge and the other of which is responsible for connecting to the power train’s grounding system.

In a diesel engine, the heating element is often represented by a glowing plug of some sort.

If the car’s computer is unable to detect the passage of electrical charge, it will display an error message on the dashboard, which will signal the P0141 problem in your vehicle.

The oxygen sensor is not intended to live indefinitely, and there will come a moment when you will have to deal with certain internal issues that will result in the P0141 fault code being shown.

While it is not always the same malfunctioning component that generates the P0141 cold, automotive specialists have come up with a list of plausible factors that might result in this worry, including the following:

  • There is an issue with the oxygen sensor heater. An issue with the circuit itself, such as some weak connections or degraded wires
  • A problem with the power supply
  • It is possible that a software upgrade will be required to remedy issues with the internal computer.

an issue with the heater for the oxygen sensor The circuit itself may have a problem, such as a few weak connections or degraded wires; A software update may be required to remedy issues with the internal computer; however, this is not always the case.

  • A warning light will appear on your dashboard
  • Your car will not pass the emission test as a result.

Because the oxygen sensor is so important in managing the emissions and the combustion process in your engine, it should come as no surprise if your car fails the emission test just because of this minor inaccuracy. As a result, if you’re going to update your registration, you won’t be able to drive away until the oxygen sensor has been repaired and the P0141 fault code has been cleared. What is the cause of the P0141 error code? The usage of an OBD 2 scanner may be required if you are unsure as to whether faults in your car are linked to the P0141 problem.

  • With a scanner, you may quickly and simply establish a connection with your car’s computer system.
  • If you don’t have access to a sophisticated scanner, even knowing that your vehicle has a P0141 fault is valuable information in and of itself.
  • What is the solution to the P0141 error code?
  • To figure out exactly what is wrong with the oxygen sensor in bank one, you will have to put in a significant amount of time and effort.
  • Once the source of the problem has been identified, the following step is to assess if a new part or a repair of the existing part is required.
  • It is possible that, even if you have a certain degree of mechanical skill sets, trying items on your automobile for the first time may result in serious complications.
  • Many individuals choose to have their P0141 error code repaired by a dealership or a professional technician simply because they do not want to mess with their automobiles, especially if they are driving a recent vehicle.
  • What is the cost of removing a P0141 error code from a computer?
  • Whether you want to fix the problem yourself or hire a professional mechanic is, of course, dependent on your preferences.
  • For example, if the problem is caused by a faulty oxygen sensor, it will only cost you between $20 and $94, depending on how complicated the repair is.

In addition, because the oxygen sensor is located in close proximity to both the engine and the catalytic converter, any problem with either of these components is a difficult one to deal with because it can cost thousands of dollars to repair and may necessitate selling your vehicle rather than repairing it.

  1. These issues may be connected to small concerns, but they may also be related to serious issues that result in extremely expensive repair expenses.
  2. As a driver, you must be aware of the location of the appropriate bank and sensor in order to avoid wasting time and effort attempting to repair a defective sensor.
  3. However, there are many more factors that might cause this error to occur.
  4. In fact, Cash Cars Buyer is one of the highest-rated firms in the country, and they guarantee to purchase your vehicle even if it has serious technical difficulties.

You may reach out to us by phone at 866-924-4608 or by visiting our website to learn more about our procedure and our team members. To get the free immediate online offer, simply click on the button.

OBD-II Trouble Code: P0141 Oxygen O2 Sensor Heater Circuit Malfunction (Bank1, Sensor2)

Circuitry for the O2 Sensor Heater is faulty (Bank 1, Sensor 2)

What does that mean?

This diagnostic trouble code (DTC) is a general powertrain code, which means that it applies to any cars that are equipped with the OBD-II diagnostic system. Despite the fact that they are general, the particular repair processes may differ based on the make and model. This code indicates that the heated circuit in the oxygen sensor on bank 1 reduces the amount of time required to reach closed loop operation. Sensor2 would be the second sensor in the chain of sensors following the engine. As soon as the O2 heater achieves operational temperature, the oxygen sensor responds by switching on and off depending on the amount of oxygen present in the exhaust around the heater.

If the ECM judges (based on coolant temperature) that the oxygen sensor has been working improperly for an excessive amount of time, it will set the P0141 code.


When the Check Engine Light illuminates, you will almost certainly notice a decrease in fuel economy.


One or more of the following events may have occurred, according to the code P0141:

  • In the wire harness, there is an open or short to ground. High resistance in the wiring of the O2 heater circuit The resistance of the O2 heating element is high. In the heating element, there is an internal short or open

It is important to note that this code is not often caused by a faulty catalytic converter. A P0420 error code is more likely to be shown when a converter fails.

Possible Solutions

  • Replace the oxygen sensor (it is not possible to fix an internal open or short that arises in the sensor)
  • Repair a short or an open circuit, as well as a high resistance in the wire harness or the harness connections.

Related DTC Discussions

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  • Dodge Neon 2004 P0141 Greetings, I am unable to turn off my check engine light despite changing the sensor behind the catalytic converter twice and the one before it once. Please note that this sensor is not a one-size fits all model
  • Instead, I purchased the precise one for my car from Oriellys. PLEASE HELP ME I’m at a loss on what to do next
  • P0141 code for a 2000 Ford Focus SE In the past several months, I’ve changed the downdraft O2 sensor TWICE as well as the catalytic converter and a set of plugs and wires. The p0141 downdraft O2 sensor failure code is still present in the car’s memory. It’s a Ford Focus SE from the year 2000. Anybody have any ideas as to what else this may possibly be? 0135, 0141, 0155, 0161, 0135, p1409, 02 Ford Taurus P0135, p0141, 0135, p1409, 02 Ford Taurus I’m a newcomer to this site. Hello everyone, first and foremost, let me tell you about the automobile. I was given a 2002 Ford Taurus for my kid, however it would not pass inspection. It has the following error codes: p0135, p0141, p0155, p0161, p0135, p01409. I checked the resistance of the heater of the oxygen sensor on bank 1 sensor 1 and found it to be acceptable. I measured 3.5 ohms. I’m aware
  • P0303 and p0141 on a 2003 Chevy Venture are misfires. The check engine light on my 2003 Chevrolet Venture is blinking, and there is a misfire. The codes were PO303 cylinder 3 misfire and PO141 O2 circuit malfunction. The problem was not resolved by changing the downstream oxygen sensor. Any assistance would be greatly appreciated. 1996 Honda Accord V6 with P0141 code I’ve had this problem, as well as an EGR low flow code, for quite some time. For approximately a week after I changed my oxygen sensor, the code was no longer there. However, the EGR low flow signal was still present. I cleaned out the EGR valve today, and the error code is no longer there. P0141, on the other hand, has returned. Is it possible that my EGR low flow activated the o2 se in my 2001 Dodge Durango P0141-0132-0138? Help! 2001 Dodge Durango, 5.9, 139,000 miles, during a journey up to Phoenix, the engine light came on, the vehicle began to stall, chugging, and misfiring, a scan found P0141, P0132, and P0138 codes, the vehicle was repaired, but the engine light remained on and the codes remained. I’m planning to replace the second oxygen sensor after the cat. Do you have any suggestions? Problem with a 2006 Opel Astra H 1.6 XEP (LPG). Sensor bank including P0141, P0400, P0443, P0130, P0300, P0301, P0302, P0303, P0304, and P0314P0141 – oxygen sensor 1 sensor 2 P0400 – flow rate of exhaust gas recirculation EGR Circut of the purge control valve of the evaporarive emission control system P0443 Also, I had a p0130 oxygen sensor bank 1 sensor 1 that I replaced in the hopes that it would clear some of the problems, but it didn’t work and I still have the codes listed above
  • P0141P0161 on a 2004 GMC Denali after a new oxygen sensor was installed I replaced my oxygen sensor since I was getting the PO161 error code. After changing my oxygen sensor, the CEL switched off automatically. PO141 and PO161 were back on the air 20 miles later. Do you have any clue what’s going on? I order a new O2 SEN component since I believe the original is faulty. I’m not sure why the PO141 light will come on
  • Assistance with 2000 Mr2 spyder throws is required. P0171, P0174, P0135, P0141, P0155, P0171, P0174, P0135, P0141, P0155 An oxygen sensor in my 2000 MR2 has been faulty for a long time without causing any noticeable driving difficulties. However, recently it has developed a coarser idle, hesitating while accelerating, exhibiting some detonation, and most recently refusing to start when the engine is hot. Although it cranks, it will not fire until it has cooled down. I ran a check and received the numbers P0171
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Need more help with a p0141 code?

If you still need assistance with the P0141 error code, please ask your issue in one of our FREE vehicle repair discussion boards. Please keep in mind that this material is being provided solely for informational reasons. It is not meant to be used as repair advice, and we are not liable for any actions you take in relation to any vehicle. All of the information on this website is protected by intellectual property rights.

P0141 Chrysler O2 Sensor 1/2 Heater Performance – CarObdCode.Com

P0141 Chrysler O2 Sensor 1/2 Heater Performance P0141 Chrysler O2 Sensor 1/2 Heater Performance Faulty Heated Oxygen Sensor is one of the possible explanations (H2OS) Heated Oxygen Sensor (Bank 1) Bank 1 Sensor 2 (H2OS) Heated Oxygen Sensor Circuit Fuse in Bank 1 Sensor 2 Circuit (H2OS) Bank 1 Sensor 2 circuit is open and shorted to ground due to the presence of a heated oxygen sensor (H2OS) faulty electrical connection in the Bank 1 Sensor 2 circuit – Engine Control Module that is faulty (ECM) Description of the technology If you receive this code, it indicates that there is a problem with either the heater element circuit or the heated oxygen sensor circuit.

  • The control module keeps track of how long it takes for the sensor to warm up and begin giving a sufficient signal to the rest of the system.
  • It is possible that water will seep into the heated oxygen sensor connection, causing the heated oxygen sensor fuse to blow.
  • If the sensor and connector are in good working order, replacing the O2 Sensor 1 will generally solve the problem.
  • What’s the deal with the obd code?
  • Symptoms– The engine light is on (or the Service Engine Soon Warning Light is illuminated) – There is a possibility of greater than typical fuel consumption.
  • If the heated oxygen sensor achieves that temperature as quickly as possible, the sensor will begin transmitting an accurate signal to the Engine Control Module (ECM).
  • The engine control module (ECM) regulates the temperature of the heated oxygen sensor heating element depending on information from the engine coolant temperature and load.
  • Because the ECM is constantly monitoring and comparing voltage signals received via the heating element circuit with manufacturer standards, it can determine if the circuit is in good working order.

Among Chrysler’s models are: the Chrysler 200, Chrysler 300M, Chrysler Crossfire, Chrysler PT Cruiser, Chrysler TownCountry, and Chrysler Voyager, to name a few.

Terrible P0056 And P0141 Codes. Any Better O2 Heater.

Hello there, geniuses. I’m looking for the P0056 and P0141 codes. After reading various web discussions, it has been determined that the NGK (or NTK) brand is the most preferred. If this is right, I discovered a listing for O2 Sensors and associated Parts, and my part number is 23133. I purchased two; they came; I installed them; I cleared the codes; I powered the car; the codes were still in the vehicle. Since I replaced the O2 Sensors with brand new ones, I’m assuming that the Heater circuit is faulty, that the wiring is faulty, or that the PCM is not performing its functions.

ScannerDanner Some serious films on Chrysler O2 Sensors may be found on the YouTube channel.

He does, however, believe that there should be a 5V reference at IGN On, Eng Off, which would be used to test the Heater Circuit (as opposed to my first assumption that it should be 12V?

I’ve tried checking the voltage at the O2 Sensor Connector Harness at IGN ON to see if I can find any 5V or 12V (Tracing the 2 White Heating Wires down to the O2 Sensor Harness), but all I got was 0V (I’m not sure if the wires I traced were the correct Wires/Pin Because the majority of these wires finish at the PCM, which is located under the headlight or PDB, I believed there must be a method to check it there, right?

  • The problem is that I have no idea what color or wire or Pinit would be appropriate, which is why I’m here.
  • Due to the fact that I have changed the oxygen sensors and am still receiving the same codes, is/are there any other easier/better diagnostic procedures that I can utilize to get to the bottom of this nagging problem?
  • Truth be told, I would disregard this insignificant problem, but I have done so for more than a year now, and I am getting 15-17 miles per gallon.
  • Thank you very much, gentlemen.

O2 Sensor – Oxygen Sensors for Your Car, Truck or SUV

P0056 and P0141 codes are being sought for by geniuses everywhere. NGK (or NTK) brands appear to be the most popular, according to various internet discussions. If this is right, I located a listing for O2 Sensors and related Parts, and my part number is 23133 in it. Thanks for your help. I purchased two; they arrived; I installed them; I cleared the codes; I started the car; the codes remained. Since I replaced the O2 Sensors with brand new ones, I’m assuming that the Heater circuit is faulty, that the wiring is faulty, or that the PCM is not doing its duties.

ScannerDanner Chrysler O2 Sensors are the subject of some serious videos on the YouTube channel.

He does, however, believe that there should be a 5V reference at IGN On, Eng Off, which would be used to test the Heater Circuit (as opposed to my first belief that it should be 12V?

I’ve attempted to check the voltage at the O2 Sensor Connector Harness at IGN ON to see if I can find any 5V or 12V (Tracing the 2 White Heating Wires down to the O2 Sensor Harness) but I only got 0V (But I’m not sure the wires that I traced were the correct Wires/Pins, Given that most of these lines finish at the PCM, which is located under the headlight or PDB, I believed there must be a method to check it there, right?

Unfortunately, I have no idea what color wire or Pinit would be appropriate, which is why I’m here in the first place.

Due to the fact that I have changed the oxygen sensors and am still receiving the same codes, is/are there any other easier/better diagnostic procedures that I can utilize to get to the bottom of this nagging issue?

True, I would disregard this insignificant problem, but I have done so for more than a year and am still getting 15-17 miles per gallon of gasoline. The vehicle in question is a 2002 Chrysler 300M. We appreciate it, gentlemen.

What is an O2 Sensor?

The oxygen sensor is in charge of monitoring the air-to-fuel ratio and exhaust emissions in the engine. The signals from the oxygen sensor are used by the Engine Control Unit to manage the quantity of air and fuel that is delivered to the engine.

What Are the Types of Oxygen Sensors?

Typically, oxygen sensors on the market may be divided into three categories: zirconia oxygen sensors, titania oxygen sensors, and wideband oxygen sensors. Oxygen sensors made of zirconia are becoming increasingly prevalent. Moreover, they may be divided into two categories: unheated and heated. In order to deliver signals to the Engine Computer Unit, unheated oxygen sensors rely on the heat generated by exhaust gases. The downside of using these sensors is that it may take more than a minute for them to reach the optimal operating temperature for functioning.

  1. It is possible that the ECU will become confused and release an incorrect amount of gasoline.
  2. When the automobile is first started, the circuit automatically warms the sensor to a safe temperature.
  3. For example, titanium oxygen sensors, in contrast to zirconia oxygen sensors, are formed of ceramic material.
  4. – Wideband: Wideband oxygen sensors, also known as air-fuel ratio sensors, are used to measure the amount of oxygen in the air.
  5. These sensors are extremely efficient, as they generate a greater amount of voltage than their zirconia counterparts, resulting in increased efficiency.

How Do Oxygen Sensors Work?

Aftermarket oxygen sensors from AutoZone can help you maintain your engine operating effectively since they are designed to perform as well as or better than the original equipment part. A reliable oxygen sensor is essential for the engine computer to work effectively because it determines how much fuel the engine requires depending on the amount of oxygen present in the system. The sensor is installed in the exhaust manifold and is used to detect the quantity of oxygen present in the exhaust gas stream.

Therefore, if the sensor malfunctions, cars might begin to consume far more fuel than is necessary.

Signs of a Bad O2 Sensor?

Poor gas mileage, a rough engine idle, starting problems, and even the failure of the catalytic converter are all signs of a faulty catalytic converter. Frequently, the check engine light will illuminate, displaying OBD II fault codes that must be investigated using a code reader.

Although garage repair service for a damaged oxygen sensor might be expensive, changing your own sensor is usually a simple DIY project that can restore smooth operation to your vehicle.

What to Consider When Buying an Oxygen Sensor

An great place to begin is by being familiar with your alternatives. You have two options: either acquire a replacement oxygen sensor from the original manufacturer or buy aftermarket sensors. Other criteria, such as price, may also be taken into consideration. The amount of money you spend on a new oxygen sensor is determined on the brand and model of your vehicle. In most cases, a replacement from the original manufacturer will cost somewhere between $20 and $100 dollars. No matter what kind of car you drive, AutoZone makes obtaining the proper components for your vehicle a simple process.

As a result of the premium materials used in their construction as well as our extensive inventory of aftermarket components from the industry’s leading manufacturers, our products are known for their superior quality and craftsmanship.

You may order online for free next-day delivery or in-store pickup the same day.

Part 1 -Oxygen Sensor Heater Test -P0141 (2000 4.7L Dodge Dakota, Durango)

The 18th of December, 2014 The most recent update was made on July 1, 2020. Contributed by:Abraham Torres-Arredondo 521 is the article ID number. You may be surprised to learn that diagnosing the rear oxygen sensor (HO2S 1/2) and/or the diagnostic trouble code (DTC)P0141:1/2 O2 Heater Failure is not as difficult as it appears. You won’t need any pricey diagnostic test equipment; all you’ll need is a multimeter to complete this procedure. P0141 is a fault code that indicates that the internal heater for the rear oxygen sensor is not working properly.

Cool thing is that the oxygen sensor may be verified to ensure that the heating element has not been damaged.

NOTE: This oxygen sensor is known by a variety of distinct names, including the following:

  1. HO2S 1/2
  2. Heated Oxygen (O2) Sensor in the rear of the vehicle. Downstream Oxygen (O2) Sensor
  3. Oxygen Sensor Bank 1 Sensor 2
  4. Oxygen Sensor Bank 3 Sensor 2
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Alternatively, if you need to troubleshoot the front oxygen sensor (HO2S 11), please see the following tutorial:

  1. 4.7L Dodge Dakota and Durango (2000 model year): Oxygen Sensor Heater Test -P0135

It is possible to find this lesson in Spanish here: Calentador del Sensor de Oxigeno -P0141 (2000 4.7L Dakota, Durango) (en:autotecnico-online.com).

Circuit Descriptions Of The Upstream Oxygen Sensor

Identifying the functions of all four sensor wires is necessary in order to correctly diagnose and resolve an internal heater problem with the rear oxygen sensor, which results in the P0141trouble code. You’ll find a description of the color of the wire as well as the sort of signal it transmits in the section below. These circuit descriptions will be utilized throughout this course.

LOCATION OF THE O2 SENSOR: Detailed instructions on how to locate the rear oxygen sensor (HO2S 1/2) may be found here: The Oxygen Sensors Are Located In This Area. For sensorHO2S 12, you’ll need to know which color wires are connected to which oxygen sensor connection on the engine wiring harness.

Downstream Oxygen Sensor (HO2S 12) Pinout(2000 4.7L Dakota -Durango w/ Federal Emissions)
Pin Wire Color Description
1 ORG/DK GRN (or DK GRN/RED) Heater Power (+)
2 BLK Heater Ground (-)
3 BLK/LT BLU O2 Signal Ground
4 ORG/TAN O2 Signal

Where To Buy The Oxygen Sensor And Save Some $$$

If you discover that the downstream oxygen sensor’s heater element is fried as a result of your testing, please refer to the resources provided below. I believe the following will save you some money: NOTE: Whether you are unsure whether the above O2 sensor will suit your specific 4.7L Durango (or Dakota), don’t worry; once you arrive at the location, they will check to see if the sensor is the correct one, and if it isn’t, they will locate the correct one for you.

TEST 1:Verifying The Heater Element Is Getting Power

To get this show up and running, we’ll start with the fundamentals, which involves making sure that the heater for the rear O2 sensor is receiving power and ground. In this phase of the test, we’ll look for electricity in the form of 12 Volts direct current. One of the wires on the rear O2 sensor’s engine wiring harness connection is orange with a dark green stripe (ORG/DK GRN), and it is this wire that supplies electricity to the rear O2 sensor’s heating element. WARNING: Even after the engine has been turned off, the oxygen sensor continues to heat up.

Make sure to use caution and to follow all required safety precautions!

To check for 12 Volts, you must test theORG/DK GRNwire of the engine wiring harness sensor connection, which is located on the sensor connector.

  1. 1Identify the downstream oxygen sensor and disconnect it from its harness connector
  2. 2Identify the ORG/DK GRN wire of the engine wiring harness oxygen sensor connector
  3. 3Identify the downstream oxygen sensor and disconnect it from its harness connector
  4. 4Identify the downstream oxygen sensor and disconnect it from its harness connector
  5. 5Identify the downstream oxygen sensor and disconnect it from its harness connector
  6. 6Identify the downstream oxygen sensor and disconnect it from its harness connector
  7. 7Identify the downstream oxygen sensor and disconnect it from its harness connector
  8. 8Identify the downstream oxygen sensor and disconnect it Three-probe the RED with the red multimeter test lead while operating your multimeter in Volts DC mode. When the Key On Engine Off (KOEO) is turned on, the ORG/DK GRN wire should have 10 to 12 Volts DC on it. 4Ground the black multimeter test lead directly to the battery negative (-) terminal when the Key On Engine Off (KOEO) is turned on.

Examine your test findings, which are as follows: CASE 1: The ORG/DK GRN wire has a voltage between 10 and 12 Volts DC. In the meantime, the test result verifies that the heater element of the downstream oxygen sensor is receiving electricity. The next step is to double-check that theBLKwire, which is connected to the O2 sensor engine wiring harness connection, is providing Ground for the heating element. To take this test, go to the following website: Verifying that the heater element is receiving ground is test number two.

Your multimeter indicates that the ORG/DK GRN wire does not have 10 to 12 Volts DC on it (case 2).

If you are still unable to detect 10 to 12 Volts DC, this test result indicates that the downstream oxygen (O2) sensor is not defective, as the heating element will not function without electricity.

Amazon.com: Customer reviews: Denso 234-4621 Oxygen Sensor

5.0 stars out of 5 for this product It is compatible with a 2001 Honda Accord with a V4 EX 2.3 ULEV and an F23A4 engine. On February 2, 2017, a review was conducted in the United States. Wow, I’m speechless. This stuff has literally saved my life. First and foremost, I am a twenty-four-year-old lady who knows virtually nothing about automobiles. However, I was keen about repairing my own automobile myself. This was especially true given the fact that I was not going to pay someone else to complete a simple task.

  • It is said that this Denso 234-4621 Oxygen Sensor will be a perfect fit for my vehicle.
  • My automobile is a 2001 Honda Accord with a V4 EX 2.3 F23A4 engine and automatic transmission.
  • I was unfortunate enough to have my automobile diagnosed with a Check Engine Light after having a new gearbox installed.
  • My 2001 Honda Accord is equipped with TWO sensors.
  • That particular error code was for the oxygen sensor that was positioned Beneath my automobile where the catalytic converter was, and not for the oxygen sensor that was located underneath my HOOD in front of the catalytic converter.
  • So, just to be clear, the Denso 234-4621 downstream sensor (the device under consideration) is what you’re searching for if you’re receiving the P0141 code and the sensor is positioned UNDERNEATH your automobile, where the catalytic converter is located, as described above.
  • Despite the fact that I was incorrect about which sensors I need, it turned out that I still required a new Denso 234-9014 upstream sensor due to the fact that mine had become oxidized after being pulled out.

Oxygen Sensor Kit with 3 pieces from RamPro.

After all is said and done, you’ll be going underneath your automobile in order to get to your catalytic converter.

All you have to do now is replace it with the new sensor and tighten it with the ratchet.

These two devices performed well in my car, and after changing both of my oxygen sensors, I was able to erase the code using my Veekpeek Code reader!

Please conduct your own research before purchasing any of the goods discussed in this review.

Please do not attempt to work on your car unless you are aware of the dangers involved.

I hope my review is of use to someone out there.

Veepeek OB2 Code Readerpsc=1 Veepeek OB2 Code Readerpsc=1 Denso 234-9014 Air Fuel Ratio Sensor (Upstream)psc=1 Denso 234-9014 Air Fuel Ratio Sensor (Downstream) 91-929 Stanley & Sons, Inc.

Got a p0420 Code? You May Need an Oxygen Sensor, Or You May Not.

When the check engine light is examined, the p0420 code is one of the most often seen. Actually, it’s ageneric code, which means that it may be thrown from any car manufactured after 1996. The most common misconception is that the p0420 code implies that the oxygen sensors need to be changed, however this is not always true.

p0420 Code: Time to Replace an Oxygen Sensor?

The fuel injection computer in your engine employs oxygen sensors to continuously fine-tune the amount of gasoline that is injected into your vehicle’s engine. A minimum of two sensors, and as many as four, will be installed in your vehicle (unless it is more than 20 years old, in which case there may be just one or none installed at all). There is one sensor located just in front of the catalytic converter. This sensor enables the engine computer to continuously adjust the quantity of gasoline delivered to your engine, ensuring optimal combustion as well as the highest possible performance and pollution levels.

This sensor monitors the operation of the catalytic converter, ensuring that it removes all traces of pollutants from your exhaust before it is turned off.

As an alternative, it’s possible that something else in the system is interfering with the oxygen sensors, making them seem broken.

Common Causes of a p0420 Code (or Something Similar)

Sensors may and do fail, generally by becoming lazier and lazier until the computer no longer trusts the information they are providing. Whenever the computer is slewing the air-fuel ratio up and down numerous times per second and the sensor is unable to keep up, a code is set, resulting in the illumination of your check engine light. Occasionally, a sensor will completely fail, usually as a result of being poisoned by leaded gasoline (which is no longer very prevalent), or by chemicals in the environment.

It’s a good idea to look into it more to see if there was something incorrect that caused it to fail.

Bad Wiring

A sensor’s four frail wires connect it to the computer: two for the signal to the computer and two for a tiny heating element that allows the sensor to reach its operational temperature more quickly when it is first turned on after a long period of inactivity. When a wire breaks, or when it melts against the hot exhaust pipes, or when it corrodes, the readings become irregular or even non-existent.

Bad Spark Plug, Wire, or Fuel Injector

Any of these factors can result in one or more cylinders misfiring. Rather than being consumed by combustion, the excess oxygen in that cylinder passes via the O2 sensor and out the other end of the cylinder. As a result, the computer believes that it is not injecting enough fuel. The problem is that the additional gasoline injected to compensate will eventually end up being consumed by the catalytic converter. This is becoming very harmful. For the same reason, a partially blocked fuel injector (there is one for each cylinder in your engine) may inject too little gasoline into a single cylinder when it is partially plugged.

It is possible for the computer to become confused about the readings. If there is any uncertainty, a code will be generated, as well as the dreaded CHECK ENGINE light.

Leaky Exhaust Pipes

A leaking exhaust pipe will, without a doubt, allow exhaust gases to escape the pipe at the point of the leak. However, air can also be drawn into the pipe as a result of the same leak. If the leak is located upstream of the sensor, the sensor will detect the excess oxygen and issue a fault code as a result of it.

Bad Catalytic Converter

This is a time-consuming and expensive repair, yet it is frequent with a p0420 code. As a result, we strongly advise that you obtain an adiagnosis before executing any replacements. Although this is a pricey repair, a p0420 error code is typical. Therefore, we strongly advise that you have your car diagnosed before having any work done.

Now That You Have Some Background, Get to a Mechanic

It is merely the first step in your mechanic’s diagnosis of the problem when a trouble code that indicates an oxygen sensor is shown (such as p0420, p0135, p0141, or other codes). It turns out that the vast majority of difficulties that cause oxygen sensor codes are not caused by a faulty sensor in the first place. In other words, replacing a sensor only because a sensor-related code has been detected is an enormous risk. A skilled technician will always utilize such issue codes as a beginning point in his diagnostic, rather than as the final conclusion.

You should now understand why you should not just request a replacement of the first component that a check engine code indicates is faulty.

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