AutoCodes – Generic – P246C

P246C Code - Diesel Particulate Filter Restriction Forced Limited Power

Quick Answer

The Diesel Particulate Filter (DPF) is monitored for conditions where it may be overloaded. Common causes include Faulty Diesel Particulate Filter. 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: P246C indicates Diesel Particulate Filter Restriction Forced Limited Power.
Common causes: Common causes include Faulty Diesel Particulate Filter.
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.

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Code Popularity 24,403

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P246C 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 P246C - Diesel Particulate Filter Restriction Forced Limited Power - AutoCodes.com — P246C Code - Diesel Particulate Filter Restriction Forced Limited Power

What does this mean?

What are the Possible Causes of the DTC P246C?

Faulty Diesel Particulate Filter

How to Fix the DTC P246C?

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 have to change the Diesel Particulate Filter and reset the code with an OBDII scanner.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P246C 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 P246C code?

Need more information on how to fix the P246C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P246C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P246C Chevrolet — Diesel Particulate Filter Restriction Forced Limited Power
P246C Dodge — Diesel Particulate Filter Restriction Forced Limited Power
P246C Ford — Diesel Particulate Filter Restriction Forced Limited Power
P246C GMC — Diesel Particulate Filter Restriction Forced Limited Power
P246C Mercedes-Benz — Diesel Particulate Filter Restriction Forced Limited Power

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 P246C Code

1. What are the common symptoms of OBDII code P246C (Diesel Particulate Filter Restriction Forced Limited Power)?

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

2. What are the possible causes of OBDII code P246C?

- The code P246C is typically triggered by a clogged diesel particulate filter (DPF), faulty DPF sensor, exhaust system issues, or engine control module (ECM) malfunction.

3. How can I diagnose OBDII code P246C at home?

- You can diagnose P246C by using an OBDII scanner to retrieve the fault codes, inspecting the DPF for blockages, checking the DPF pressure sensor, and examining the exhaust system for leaks or damage.

4. What are the repair options for OBDII code P246C?

- Repair options may include cleaning or replacing the DPF, replacing the DPF pressure sensor, repairing any exhaust system leaks, and resetting the ECM to clear the code.

5. Can I continue driving with OBDII code P246C present?

- It is not recommended to continue driving with code P246C as it can lead to further damage to the engine and emissions system. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P246C?

- The cost of repairing code P246C can vary depending on the extent of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Are there any preventive maintenance tips to avoid OBDII code P246C?

- Regularly servicing your diesel vehicle, using high-quality fuel, driving at highway speeds to aid DPF regeneration, and avoiding short trips can help prevent issues leading to code P246C.

8. Can a DIY enthusiast fix OBDII code P246C at home?

- While some aspects of diagnosing and repairing code P246C can be done at home by experienced DIY enthusiasts, specialized equipment and knowledge may be required for certain repairs, so professional help is often recommended.

9. How long does it take to repair OBDII code P246C?

- The repair time for code P246C can vary depending on the specific cause and extent of the issue. Simple fixes may take a few hours, while more complex repairs could take a day or longer.

10. Will resetting the ECM clear OBDII code P246C permanently?

- Resetting the ECM may clear the code temporarily, but if the underlying issue causing code P246C is not addressed, the code is likely to return. It is essential to diagnose and fix the root cause for a permanent solution.