Powertrain
generic / SAE
P0252
Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector)
Injection pump metering control A does not respond as expected. 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 / 52
Possible causes
- Actuator drifted high
- Sensor element aged beyond calibration window low
- Sensor mounting loose - signal damping low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 300–2500 €
- Estimated time: 2–10 h
- Component: injection pump
- Component: metering actuator a
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012