Powertrain
generic / SAE
P009F
Fuel Pressure Relief Control Stuck On
Pressure relief solenoid stays open when not commanded — rail pressure cannot build up properly.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 9F
Possible causes
- Solenoid stuck open high
- Carbon or debris buildup preventing free movement low
- Component wear with age - mechanical play low
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 100–700 €
- Estimated time: 0.5–3 h
- Component: pressure relief solenoid
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012