P2453Diesel Particulate Filter Pressure Sensor A Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2453 means the particulate filter pressure signal is electrically fine but does not behave like a real filter pressure. Manufacturers use two kinds of test. With the engine off there should be almost no pressure difference: GM's 2009 Duramax fails above 4.1 kPa, the 2014 Cruze 2.0 diesel above 3.2 kPa in after-run, and the Opel/GM 2.0 CDTi in the Saab 9-5 (2010) checks once at least 60 s after shutdown. With the engine running the signal has to follow changes in exhaust flow: the Duramax expects it to rise and fall when the flow changes by more than 200 m³/h per second, and Ford's 2023 diesels fail a reading under 1 kPa at 500 m³/h or more, which points to a disconnected or split hose. Saab adds that kinked braided hoses do not recover their shape. Audi (Q7 TDI) found moisture in sensor G505, Chrysler (2.8 diesel) checked sensor and connector, and Stellantis found open circuits and bad PCM grounds. Without a valid signal the soot load is estimated, often followed by P2463.
- What you may notice
- Malfunction indicator lamp on
- DPF warning, regeneration inhibited or too frequent
- Reduced power on some vehicles
- Likely causes
- LikelySensor hose disconnected, split, kinked or blocked
- PossibleSensor skewed or stuck, for example from moisture ingress
- RareHigh resistance in sensor wiring or ECM grounds
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.