Code result

P246B

Vehicle Conditions Incorrect for Particulate Filter Regeneration

Moderate severity

What it means

The driving pattern (short trips, low speed, frequent stops) does not provide the load and EGT needed for passive or active DPF regeneration. Filter loading rises until limit reached.

Is it safe to drive?

Use caution

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.

Most likely causes

  • Short-trip operation

    high

    One of the most commonly reported causes for this code — check this first.

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