OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0002?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyHigh-pressure pump worn or leaking internally
- PossibleRegulator valve sticking from contamination
- PossibleRail pressure sensor reading drifted
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Fuel Volume Regulator, High Pressure Fuel Pump, Fuel Rail Pressure Sensor
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.