Powertrain
generic / SAE
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.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 55
Possible causes
- Connector loose or corroded high
- Connector with intermittent contact under vibration low
- Harness routed against vibrating component low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 150–2000 €
- Estimated time: 1–6 h
- Component: metering actuator a
- Component: actuator wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012