P0255Injection Pump Fuel Metering Control A Intermittent (Cam/Rotor/Injector)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- These codes cover the electrically controlled fuel metering actuator on a diesel injection pump – on common rail usually an inlet metering valve on the high-pressure pump that sets how much fuel is compressed. P0255 reports brief open or short circuits in the actuator A circuit that come and go – typically a loose contact or a wire breaking under vibration. No manufacturer using it with exactly this meaning was found; a Ram 6.7 Cummins code list names it as a circuit performance fault instead. The description follows CARB's continuous circuit monitoring requirement and the documented A siblings.
- What you may notice
- Check engine light (often goes out again)
- Brief jerking or power dips
- Occasional limp mode
- Likely causes
- LikelyLoose contact or corrosion at the metering actuator connector
- PossibleHarness chafing intermittently (vibration)
- RareActuator coil with a temperature-dependent fault
- RareEngine module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.