P2465
Diesel Particulate Filter Differential Pressure Sensor Range/Performance
The DPF differential pressure sensor signal is implausible compared to engine load and exhaust flow. Either the sensor or the pressure tubes leading to it are at fault.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
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.
- Soot/water clogged pressure tubesCommon
- Sensor driftPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- DPF Diff Pressure Sensor
- DPF Pressure Lines
P2465 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.