OBD-II code · Powertrain (generic, extended)
P2455 Diesel Particulate Filter Pressure Sensor Circuit High
Voltage on the DPF pressure sensor line exceeds the upper threshold. Usually a short to supply or an open ground on the sensor.
Is it safe to drive with P2455?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal shorted to supply
- PossibleSensor ground open
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Dpf Differential Pressure Sensor, Dpf Pressure Sensor Wiring
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.