Powertrain
generic / SAE
P2A40
Alternative Fuel System - Injector Leakage to Rail Detected
The AFCM detects pressure decay in the alternative fuel rail consistent with injector leakage. Even with all injectors commanded closed, fuel flows back into the rail.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / 40
Possible causes
- Injector seat worn - leaks closed high
- Injector seal aged - external leak path medium
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–2200 €
- Estimated time: 2–8 h
- Component: alt fuel injectors
- Component: alt fuel rail
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012