AutoCodes – Generic – P246B

P246B 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 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.

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Code Popularity 43,490

How popular is this code, among other codes? Medium

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
Comments
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Code P246B 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 - Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration - AutoCodes.com — P246B Code - Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration

What does this mean?

What are the Possible Causes of the DTC P246B?

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

How to Fix the DTC P246B?

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 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.

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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.