P0251
PowertrainFuel Systemhigh severityInjection Pump Fuel Metering Control A (Cam/Rotor/Injector)
What P0251 Means
Malfunction in the diesel injection pump fuel metering control.
Symptoms
- Check Engine Light
- Rough running
- Excessive smoke
- Poor power
Common Causes
- Injection pump failure
- Fuel metering valve stuck
- Wiring issue
- Contaminated fuel
Diagnostic Steps
- Test fuel metering valve
- Check wiring
- Inspect injection pump
- Test fuel quality
Where to start: Service or replace injection pump. Common in diesel engines.
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