Powertrain
generic / SAE
P0002
Fuel Volume Regulator A Control Circuit Range/Performance
The control signal of fuel volume regulator A is electrically present but the actual rail pressure does not follow the target value within tolerance. Indicates a mechanical or hydraulic issue rather than pure wiring.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 02
Possible causes
- High-pressure pump worn or leaking internally high
- Regulator valve sticking from contamination medium
- Rail pressure sensor reading drifted medium
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–5 h
- Component: fuel volume regulator
- Component: high pressure fuel pump
- Component: fuel rail pressure sensor
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012