OBD-II code · Powertrain (generic)
P0255 Injection Pump Fuel Metering Control A Intermittent (Cam/Rotor/Injector)
Intermittent signal on injection pump metering control A. A flow-deviating injector throws off cylinder balance — adjacent cylinders run leaner/richer to compensate, often masking the root cause until the trim limit is hit.
Is it safe to drive with P0255?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyConnector loose or corroded
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Metering Actuator A, Actuator Wiring
Related codes
- P0252Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector)
- P0253Injection Pump Fuel Metering Control A Low (Cam/Rotor/Injector)
- P0254Injection Pump Fuel Metering Control A High (Cam/Rotor/Injector)
- P0256Injection Pump Fuel Metering Control B (Cam/Rotor/Injector)
- P0257Injection Pump Fuel Metering Control B Range/Performance (Cam/Rotor/Injector)
- P0258Injection Pump Fuel Metering Control B Low (Cam/Rotor/Injector)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.