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P2002 - How To Repair: Meaning, Causes, Symptoms, Fixes

P2002 - OBD2 Trouble Code Particulate Filter Efficiency Below Threshold

P2002 Code Definition

Diesel Particulate Filter Efficiency Below Threshol (Bank 1)

What Does the Engine Code P2002 Mean?

Character "P" in the first position of Diagnostic Trouble Code (DTC) represents the powertrain system (engine and transmission), "2" in the second position means that this is a ISO/SAE controlled OBD-II (OBD2) DTC. "0" in the third character position in a DTC indicates that the fuel and air metering and auxiliary emission controls is experiencing a malfunction. The last two characters "02" is DTC number. OBD2 Diagnostic Trouble Code P2002 means that Particulate Filter Efficiency Below Threshold has been detected.

Carly's expert mechanics have identified the following related fault codes. With the information for these fault codes it is often possible to identify and better repair your faulty part/system:

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    What Is the Cause of P2002?

    There can be several damages/failures causing the underlying problem of the OBD2 DTC P2002. To find the root cause of P2002, unlock the “Smart Mechanic" feature in the Carly app.

    What Are the Symptoms of the Code P2002?

    Symptoms for this error

      Illumination of a warning lamp in the instrument cluster

      Decreased engine power (DPF overloaded)

      Further fault memory entries in connection with the DPF

      Possible heavy soot formation during acceleration

      No regeneration of the DPF

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    How much does it cost to diagnose P2002?

    Visiting a car repair shop and letting them perform a diagnostics check can cost you $60-$100. For almost the same price you can get Carly. Its advanced features can cover what a professional automotive scanner that costs over $3,000 would, and more!

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    How To Diagnose and Clear the Code P2002?

    Performing a diagnostics check with a diagnostic scanner helps you identify a particular problem area that is outside the normal range and shows where a fault might be occurring. This helps you to detect errors before they cause more damage to your vehicle. In comparison to generic OBD devices that only provide OBD-level engine-related data, Carly can run advanced manufacturer-level diagnostics, check all your ECUs in your car (like ABS, airbag, multimedia) and get deeper insights. You can find additional information about the trouble code and understand the severity of the problem. With the new Smart Mechanic feature, you get additional professional insights and tips from expert mechanics. You are able to check components and their mechanics, find detailed repair tips, and learn about potential future damage. After you have fixed the problem you can easily clear the fault codes with Carly, too. Also, the diagnostic results are safely stored inside the app or as convenient PDF reports you can share with your friends or a mechanic.

    Common Mistakes when diagnosing the P2002 code

    The most common mistake is to look and try to fix each individual OBD2 (OBD-II) code without having a holistic understanding and approach. Understanding the interrelationship of different systems is crucial to determining the root cause of the problem and finding the right solution. The new Carly Smart Mechanic feature provides a look at the whole system, not just one individual code. Enable Smart Mechanic in your Carly app and get a holistic solution-focused approach when diagnosing the code P2002.

    How Serious Is the Code P2002?

    This issue is not critical yet. Make sure that it is current and fix it early before this leads to more severe issues.

    How to fix the P2002 Code

    P2002 is a generic fault code but the repair steps may vary depending on the root cause and the make/model of your vehicle. Get the Smart Mechanic in your Carly app to learn more and receive guidance.

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    Estimated Cost of Repair for the P2002 Code

    The cost very much depends on the root cause of the issue. To find more information about causes, possible solutions, and potential repair costs, unlock “Smart Mechanic" content on the Carly app.

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    Learn more about the P2002 Code

    Mode of operation

    The exhaust backpressure sensor is located just upstream of the diesel particulate filter (DPF). It measures the exhaust backpressure in the exhaust gas flow. This flows from the turbocharger to the DPF. The sensor continuously measures the exhaust backpressure and sends the measured values to the engine control unit. If the measured value does not correspond to the target specifications, an error memory entry is stored in the engine control unit and a warning light lights up in the instrument cluster (speedometer). This usually happens when the diesel particulate filter is clogged.

    *Every car is unique. The Carly Features that your car supports depend on the model, build year, hardware, and software in the car. Plug the scanner in the OBD2 port, connect to the app, run your first diagnostics, and check which features are available for your car. Also, keep in mind that any information provided on this website is for informational purposes only and should be used at your own risk. Mycarly.com is not responsible for any errors or omissions, or for the results stemming from the use of this information.

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