P2455Diesel Particulate Filter Pressure Sensor A Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2455 means the particulate filter pressure sensor signal sits above the highest plausible value, at the top of the 5 V range. Ford's 2023 diesels and the Opel/GM 2.0 CDTi in the Saab 9-5 (2010) both use 4.9 V as the limit, Ford within 2 s and Saab after 1 s; on Ford's 6.7 L the signal follows roughly 0.082 V per kPa above 0.45 V, so 4.9 V would be about 54 kPa. Typical faults are a signal wire shorted to the 5 V reference or to battery voltage, or an open low-reference (ground) circuit, which Saab lists among the circuit faults for this code. A real pressure that high from a blocked filter is unusual and would normally first raise soot codes such as P2463. Chrysler lists P2455 on the 2.8 diesel Town and Country with a sensor and connector check. The ECM falls back to a modelled soot load and may limit regeneration.
- What you may notice
- Malfunction indicator lamp on
- DPF warning or regeneration inhibited
- Likely causes
- LikelySignal wire shorted to 5 V reference or battery voltage
- PossibleSensor low-reference (ground) circuit open
- PossibleInternal sensor failure
- 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: €30 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.