P0253
PowertrainFuel Injectorhigh severityInjection Pump Fuel Metering Control B Low (Cam/Rotor/Injector)
What P0253 Means
The PCM detected a low signal in the diesel injection pump fuel metering control 'B' circuit. This can affect fuel delivery and engine performance.
Symptoms
- Hard starting
- Rough running
- Reduced power
Common Causes
- Faulty fuel metering control valve
- Short to ground in circuit
- Wiring or connector damage
- Injection pump fault
Diagnostic Steps
- Scan for diesel fuel codes
- Inspect metering control valve wiring
- Check circuit for shorts to ground
- Test injection pump operation
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ANCEL AD410 →
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Serious DIY~$100
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Autel MaxiCOM MK808S →
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✓ Autel official store
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