P2453
Diesel Particulate Filter Pressure Sensor Circuit Range/Performance
The DPF differential-pressure sensor produces a value that is electrically valid but does not match expectations — for example a non-zero reading with engine off or no change between idle and load.
- 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.
- Sample hoses clogged or kinkedCommon
- Sensor driftPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- DPF Differential Pressure Sensor
- DPF Pressure Sensor Wiring
P2453 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.