AutoCodes – Mercedes-Benz – P246B Mercedes-Benz

P246B Mercedes-Benz Code - Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration

Quick Answer

The Powertrain Control Module (PCM) monitors the conditions necessary for diesel particulate filter regeneration. Common causes include Fuel system concerns, Turbocharger system concern, Exhaust leaks. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P246B Mercedes-Benz indicates Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration.
Common causes: Common causes include Fuel system concerns, Turbocharger system concern, Exhaust leaks.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 11,307

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P246B Mercedes-Benz Description

The Powertrain Control Module (PCM) monitors the conditions necessary for diesel particulate filter regeneration. The test fails when the level of diesel particulate filter regeneration is not at the target reduction after 13 minutes of active regeneration.

OBDII Code P246B Mercedes-Benz - Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration - AutoCodes.com — P246B Mercedes-Benz Code - Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration

What does this mean?

What are the Possible Causes of the DTC P246B Mercedes-Benz?

Fuel system concerns
Turbocharger system concern
Exhaust leaks
Oxidation catalytic converter (OC)
Aftermarket exhaust accessories or performance modifications

How to Fix the DTC P246B 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P246B 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 P246B Mercedes-Benz code?

Need more information on how to fix the P246B Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P246B 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 P246B Mercedes-Benz Code

1. What are the common symptoms of OBDII code P246B in a Mercedes-Benz related to the Diesel Particulate Filter (DPF) regeneration?

- 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 P246B in a Mercedes-Benz?

- The code P246B typically indicates that the vehicle conditions are incorrect for DPF regeneration, which can be caused by a faulty DPF sensor, poor driving conditions, or a clogged DPF.

3. How can I diagnose OBDII code P246B in my Mercedes-Benz?

- Diagnosing code P246B involves using an OBDII scanner to retrieve the fault codes and conducting a visual inspection of the DPF system for any visible issues.

4. What are the potential repair tips for resolving OBDII code P246B in a Mercedes-Benz?

- Repair tips may include performing a forced regeneration of the DPF, replacing the DPF sensor, ensuring proper driving conditions for regeneration, and addressing any underlying issues causing poor DPF performance.

5. Can I continue driving my Mercedes-Benz with OBDII code P246B present?

- It is not recommended to continue driving with code P246B as it can lead to further damage to the DPF system and may result in more costly repairs over time.

6. How much does it typically cost to repair OBDII code P246B in a Mercedes-Benz?

- The cost of repairing code P246B can vary depending on the specific issue causing the fault, but it may range from a few hundred to a few thousand dollars, including parts and labor.

7. Are there any preventive measures to avoid OBDII code P246B in a Mercedes-Benz?

- Regular maintenance of the DPF system, using high-quality diesel fuel, and driving the vehicle under proper conditions for DPF regeneration can help prevent code P246B from occurring.

8. Can I reset the OBDII code P246B in my Mercedes-Benz myself?

- While you can clear the fault code with an OBDII scanner, it is essential to address the underlying issue causing the code to prevent it from reoccurring.

9. How long does it take to perform a DPF regeneration to resolve OBDII code P246B in a Mercedes-Benz?

- The time needed for a DPF regeneration can vary depending on the vehicle's condition and the method used, but it typically takes around 30 minutes to an hour to complete.

10. Does OBDII code P246B in a Mercedes-Benz affect emissions or vehicle safety?

- Code P246B related to the DPF system can impact emissions and engine performance, so it is essential to address the issue promptly to maintain the vehicle's efficiency and comply with emission regulations.