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Engine-Codes – Generic – P2002

P2002 Code - Diesel Particulate Filter Efficiency Below Threshold Bank 1

Quick Answer

The P2002 diagnostic trouble code (DTC) indicates that the Diesel Particulate Filter (DPF) efficiency on Bank 1 is below the threshold. Common causes include Clogged or saturated DPF, Faulty DPF sensor, Engine oil contamination. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2002 indicates Diesel Particulate Filter Efficiency Below Threshold Bank 1.
Common causes
Common causes include Clogged or saturated DPF, Faulty DPF sensor, Engine oil contamination.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P2002 Description

The P2002 diagnostic trouble code (DTC) indicates that the Diesel Particulate Filter (DPF) efficiency on Bank 1 is below the threshold. In diesel vehicles equipped with DPF systems, the filter is designed to trap and remove harmful particulate matter (soot) from the exhaust gases before they are released into the atmosphere. When the DPF becomes clogged or inefficient, it can lead to a decrease in engine performance, reduced fuel efficiency, and increased emissions.

OBDII Code P2002 - Diesel Particulate Filter Efficiency Below Threshold Bank 1
P2002 Code - Diesel Particulate Filter Efficiency Below Threshold Bank 1

Common Causes of P2002

  1. Clogged or saturated DPF
  2. Faulty DPF sensor
  3. Engine oil contamination
  4. Faulty EGR valve
  5. Issues with the fuel injection system

Symptoms of P2002

  1. Reduced engine power or acceleration
  2. Increased fuel consumption
  3. Illuminated check engine light
  4. Excessive smoke from the exhaust
  5. Engine misfires or rough idling

How to Fix P2002

  1. Perform a diagnostic scan to confirm the P2002 code and identify the specific issue causing the DPF inefficiency.
  2. Inspect the DPF for any signs of clogging or saturation. If necessary, the DPF may need to be cleaned or replaced.
  3. Check the DPF sensor and EGR valve for proper functioning. Replace any faulty components as needed.
  4. Perform an engine oil analysis to check for contamination. Change the oil and filters if necessary.
  5. Clear the DTC and reset the engine control module to monitor the DPF efficiency after repairs are completed.

Cost to Fix P2002

The cost of repairing a P2002 DTC can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of replacing a DPF filter can range from $1000 to $3000, including parts and labor. Additional costs may be incurred if other components, such as sensors or valves, need to be replaced. It's recommended to consult with a qualified mechanic or dealership for a more accurate cost estimate based on the make and model of the vehicle. Remember that labor rates and parts prices can vary significantly based on location and other factors.

What does this mean?

Tech Notes for P2002

To resolve this, you will have to change the Diesel Particulate Filter and reset the code with an OBD scanner.

Need more information about the P2002 code?

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Code P2002 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2002 Code

1. What are common symptoms of OBDII code P2002 (Diesel Particulate Filter Efficiency Below Threshold Bank 1)?

- Common symptoms include reduced engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P2002?

- The code P2002 can be triggered by a clogged or faulty diesel particulate filter (DPF), issues with the exhaust system, faulty sensors, or a malfunctioning diesel oxidation catalyst (DOC).

3. How can I diagnose the cause of OBDII code P2002?

- Proper diagnosis typically involves inspecting the DPF for clogs, checking the exhaust system for leaks or damage, testing sensors related to emissions, and scanning for any other related fault codes.

4. What are some repair tips for fixing OBDII code P2002?

- Repair options may include cleaning or replacing the DPF, repairing any exhaust leaks, replacing faulty sensors, addressing issues with the DOC, and performing a forced regeneration of the DPF.

5. Can I drive my vehicle with OBDII code P2002?

- It is generally not recommended to continue driving with this code as it can lead to further damage to the engine or emissions system. It is advised to address the issue promptly.

6. How much does it typically cost to repair OBDII code P2002?

- The cost of repairing the code P2002 can vary depending on the specific cause of the issue, but it may range from a few hundred to a couple of thousand dollars, including parts and labor.

7. Is it possible to prevent OBDII code P2002 from occurring?

- Regular maintenance of the diesel particulate filter and the exhaust system, using high-quality fuel, and driving at highway speeds regularly can help prevent issues that lead to code P2002.

8. Can I reset the check engine light after fixing OBDII code P2002?

- After repairing the underlying issue causing code P2002, the check engine light can be reset using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

9. Should I attempt to repair OBDII code P2002 on my own?

- The complexity of the repair for code P2002 may require specialized tools and knowledge, so it is recommended to consult with a professional mechanic or technician for proper diagnosis and repair.

10. How long does it take to fix OBDII code P2002?

- The repair time for code P2002 can vary depending on the specific cause and the availability of parts, but it may take anywhere from a few hours to a day or more to complete the repair.

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