P2462
Diesel Particulate Filter Restriction - Soot Accumulation
The DPF differential pressure sensor reports a backpressure rise consistent with excessive soot accumulation. The filter cannot regenerate fast enough, eventually causing limp mode.
- 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.
- Repeated failed regeneration cyclesCommon
- Heavily clogged DPFCommon
Parts involved
- Diesel Particulate Filter
- DPF Diff Pressure Sensor
P2462 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.