Diesel Particulate Filter Restriction — Soot Accumulation
The estimated soot mass in the DPF has crossed the upper limit and the ECU could not complete a regeneration to bring it back down. Very common on cars used on short trips. Continued driving in this state risks a runaway regeneration that destroys the filter.
Affected components
- Diesel particulate filter
- Dpf differential pressure sensor
- Exhaust temperature sensor
Common causes
- High likelihood: DPF heavily loaded after multiple aborted regenerations
- High likelihood: Predominantly short-trip operation
- Low likelihood: Differential pressure sensor reading drifted high
Possible symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
- Reduced-power or limp mode may occur
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.