AutoCodes – Mercedes-Benz – P2003 Mercedes-Benz

P2003 Mercedes-Benz Code - Diesel Particulate Filter Efficiency Below Threshold Bank 2

Quick Answer

Manufacturers have to implement measures to reduce exhaust gas soot emissions. 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: P2003 Mercedes-Benz indicates Diesel Particulate Filter Efficiency Below Threshold Bank 2.
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 7,496

How popular is this code, among other codes? Low

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 Jul 05, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2003 Mercedes-Benz Description

Manufacturers have to implement measures to reduce exhaust gas soot emissions. The soot emissions are expelled in form of particle matter. A particle filter or trap is fitted to the exhaust system to store this particle matter. Once the filter reaches a predetermined loading a regeneration process is initiated. The purpose of the regeneration is to burn off/oxidise the soot particles to create harmless carbon dioxide, nitrogen and water. Many additional components are fitted to the exhaust system to closely monitor the operation of the particle filter. These include temperature sensors to ensure the conditions are met for regeneration and a thermal overload does not occur. An exhaust gas pressure differential sensor, to measure exhaust gas pressure across the filter. Occasionally a broadband oxygen sensor can be fitted to measure the quantity of oxygen in the exhaust gas. Some manufacturers choose to fit a fuel injector into the exhaust to inject fuel into the hot exhaust gas stream to raise the temperature for regeneration.

OBDII Code P2003 Mercedes-Benz - Diesel Particulate Filter Efficiency Below Threshold Bank 2 - AutoCodes.com — P2003 Mercedes-Benz Code - Diesel Particulate Filter Efficiency Below Threshold Bank 2

What does this mean?

What are the Possible Causes of the DTC P2003 Mercedes-Benz?

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

How to Fix the DTC P2003 Mercedes-Benz?

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

There is a Factory Service Bulletin for the various Mercedes-Benz models.
Mercedes-Benz Factory Service Bulletin OBDII Code P2003

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2003 Mercedes-Benz 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 P2003 Mercedes-Benz code?

Need more information on how to fix the P2003 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2003 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area

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 P2003 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P2003 in a Mercedes-Benz related to the Diesel Particulate Filter efficiency below threshold on Bank 2?

- Common symptoms include reduced engine performance, increased fuel consumption, black smoke from the exhaust, and the illumination of the check engine light.

2. What are the potential causes of the OBDII code P2003 in a Mercedes-Benz indicating Diesel Particulate Filter inefficiency on Bank 2?

- Possible causes include a clogged or faulty Diesel Particulate Filter (DPF), issues with the exhaust system, faulty sensors, or a malfunctioning DPF pressure sensor.

3. How can I diagnose the OBDII code P2003 in my Mercedes-Benz related to the Diesel Particulate Filter inefficiency on Bank 2?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the DPF for clogs or damage, checking the sensors related to the DPF system, and conducting a thorough visual inspection of the exhaust system.

4. What are the repair options for addressing OBDII code P2003 in a Mercedes-Benz with Diesel Particulate Filter inefficiency on Bank 2?

- Repair options may include cleaning or replacing the Diesel Particulate Filter, repairing any exhaust system leaks or damage, replacing faulty sensors, and resetting the fault code using a diagnostic tool.

5. Can I continue driving my Mercedes-Benz with the OBDII code P2003 indicating Diesel Particulate Filter inefficiency on Bank 2?

- It is not recommended to continue driving the vehicle with this fault code illuminated, as it can lead to further damage to the engine or emissions system. It is best to address the issue promptly.

6. How can I prevent the recurrence of OBDII code P2003 in my Mercedes-Benz after repairing the Diesel Particulate Filter inefficiency on Bank 2?

- Regular maintenance, using high-quality diesel fuel, and avoiding short trips that don't allow the DPF to regenerate fully can help prevent the recurrence of this fault code.

7. Is it possible to clean the Diesel Particulate Filter in a Mercedes-Benz to resolve the OBDII code P2003 issue on Bank 2?

- In some cases, a professional cleaning service for the DPF may help resolve the issue. However, if the filter is severely clogged or damaged, replacement may be necessary.

8. Are there any aftermarket solutions available to address the OBDII code P2003 related to Diesel Particulate Filter inefficiency on Bank 2 in a Mercedes-Benz?

- There are aftermarket DPF cleaning kits and additives available, but it's essential to ensure that any aftermarket solution meets the manufacturer's specifications to avoid further issues.

9. How long does it typically take to repair the OBDII code P2003 in a Mercedes-Benz indicating Diesel Particulate Filter inefficiency on Bank 2?

- The repair time can vary depending on the exact cause of the issue. Simple fixes like sensor replacements may take a shorter time, while DPF cleaning or replacement may require more labor.

10. Can resetting the check engine light after repairing OBDII code P2003 in a Mercedes-Benz resolve the issue permanently?

- While resetting the check engine light can clear the immediate fault code, it's essential to address the root cause of the problem to prevent the code from reoccurring.