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Engine-Codes – Generic – P246B

P246B Code - Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration

Quick Answer

The P246B diagnostic trouble code (DTC) indicates that the vehicle conditions are incorrect for diesel particulate filter (DPF) regeneration. Common causes include Incorrect driving conditions (short trips, low speeds, stop-and-go driving), Faulty exhaust gas temperature sensor, Clogged DPF 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
P246B indicates Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration.
Common causes
Common causes include Incorrect driving conditions (short trips, low speeds, stop-and-go driving), Faulty exhaust gas temperature sensor, Clogged DPF 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P246B Description

The P246B diagnostic trouble code (DTC) indicates that the vehicle conditions are incorrect for diesel particulate filter (DPF) regeneration. In diesel vehicles equipped with a DPF, the filter traps soot and other harmful emissions, which need to be periodically burned off to prevent clogging and maintain optimal engine performance. Regeneration is the process by which the accumulated soot is burned off at high temperatures, reducing emissions and keeping the filter clean.

OBDII Code P246B - Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration
P246B Code - Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration

Common Causes of P246B

  1. Incorrect driving conditions (short trips, low speeds, stop-and-go driving)
  2. Faulty exhaust gas temperature sensor
  3. Clogged DPF filter
  4. Malfunctioning regeneration system components
  5. Engine running in a state that prevents regeneration (e.g., low fuel level, high engine load)

Symptoms of P246B

  1. Reduced engine power or acceleration
  2. Increased fuel consumption
  3. Illuminated check engine light
  4. Excessive black smoke from the exhaust
  5. Poor overall engine performance

How to Fix P246B

  1. Perform a diagnostic scan to confirm the P246B code and identify any other related codes.
  2. Check the exhaust gas temperature sensor for proper operation and replace if faulty.
  3. Inspect the DPF filter for clogging and clean or replace if necessary.
  4. Test the regeneration system components (heating elements, sensors, valves) for proper function and repair or replace as needed.
  5. Drive the vehicle under conditions that facilitate DPF regeneration to allow the ECM to complete the process.

Cost to Fix P246B

The typical repair costs for addressing a P246B code can vary depending on the specific cause of the issue. Parts like an exhaust gas temperature sensor or a new DPF filter can range from $100 to $500 or more, while labor costs can add an additional $100 to $200 per hour. Overall, the total repair cost for this issue may range from $300 to $1500, depending on the extent of the problem and the specific repairs required. It's advisable to consult with a qualified mechanic or auto repair shop for an accurate cost estimate based on your vehicle's make and model.

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Code P246B Information for Specific Makes

  • P246B Chevrolet — Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration
  • P246B Dodge — Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration
  • P246B Ford — Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration
  • P246B GMC — Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration
  • P246B Mercedes-Benz — Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration
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.

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