P2463
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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Common causes
Ordered by how often each turns out to be the cause.
- DPF heavily loaded after multiple aborted regenerationsCommon
- Predominantly short-trip operationCommon
- Differential pressure sensor reading drifted highLess likely
Parts involved
- Diesel Particulate Filter
- DPF Differential Pressure Sensor
- Exhaust Temperature Sensor
P2463 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.