AutoCodes – Generic – P2002

P2002 Code - Diesel Particulate Filter Efficiency Below Threshold Bank 1

Quick Answer

The Diesel Particulate Filter (DPF) is monitored for conditions where it may be overloaded. Common causes include Faulty, damaged or clogged Diesel Particulate Filter (DPF), Dirty air cleaner element. 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 Faulty, damaged or clogged Diesel Particulate Filter (DPF), Dirty air cleaner element.
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.

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Code Popularity 44,459

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 27, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2002 Description

The Diesel Particulate Filter (DPF) is monitored for conditions where it may be overloaded. The monitor compares the calculated restriction of the DPF to two thresholds. By exceeding the first threshold for a sufficient period of time, a wrench light will be illuminated. By exceeding the second threshold for a sufficient period of time, a wrench light and a MIL will be illuminated and engine output will be limited and EGR is disabled.

OBDII Code P2002 - Diesel Particulate Filter Efficiency Below Threshold Bank 1 - AutoCodes.com — P2002 Code - Diesel Particulate Filter Efficiency Below Threshold Bank 1

What does this mean?

What are the Possible Causes of the DTC P2002?

Faulty, damaged or clogged Diesel Particulate Filter (DPF)
Dirty air cleaner element

How to Fix the DTC P2002?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2002 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P2002 code?

Need more information on how to fix the P2002 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2002 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2002 Audi — Diesel Particulate Filter Efficiency Below Threshold Bank 1
P2002 Buick — Diesel Particulate Filter Low Efficiency
P2002 Cadillac — Diesel Particulate Filter Low Efficiency
P2002 Chevrolet — Diesel Particulate Filter Low Efficiency
P2002 Dodge — Diesel Particulate Filter Efficiency Below Threshold Bank 1
P2002 Ford — Diesel Particulate Filter Efficiency Below Threshold Bank 1
P2002 GMC — Diesel Particulate Filter Low Efficiency
P2002 Isuzu — Diesel Particulate Filter Efficiency Below Threshold Bank 1
P2002 Mercedes-Benz — Diesel Particulate Filter Efficiency Below Threshold Bank 1
P2002 Volkswagen — Diesel Particulate Filter Efficiency Below Threshold Bank 1

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.