Powertrain
generic / SAE
P01A9
Alternative Fuel Rail/System Pressure - Too High
Alt fuel rail or system pressure above the expected operating range.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / A9
Possible causes
- Regulator stuck closed high
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–5 h
- Component: alt fuel regulator
- Component: return valve
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012