P1249 – Fuel Pressure Relief Valve Fault
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Symptoms
- Hard starting
- Rough idle
- Fuel smell
- Possible rail noise
- Check engine light
Causes
- Stuck open valve
- Stuck closed valve
- Contamination
- Spring fatigue
- Improper installation
Diagnosis
- Check rail pressure
- Inspect for leaks
- Check valve operation
- Inspect for contamination
- Scan live data
Repair
- Replace relief valve
- Clean fuel rail
- Replace contaminated components
- Ensure correct installation
- Clear codes and retest