P1210 – Fuel Pressure Too High
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Symptoms
- Black exhaust smoke
- Rough idle
- Poor fuel economy
- Strong fuel smell
- Check engine light
Causes
- Stuck regulator
- Blocked return line
- Overactive fuel pump
- Leaking injectors
- ECU control fault
Diagnosis
- Measure fuel pressure
- Inspect return line
- Check regulator vacuum
- Scan fuel trims
- Check injector leakage
Repair
- Replace regulator
- Repair return line
- Replace fuel pump
- Service injectors
- Update ECU software