Engine and gearbox (P)
P0003: Fuel Volume Regulator A Circuit Low
The engine control unit (ECU) detects that the control voltage for the fuel volume regulator A is lower than expected. This usually indicates a short to ground or a low-resistance fault in the wiring or regulator coil.
Checked by a licensed car technician · last reviewed 29 September 2026
Symptoms
- Check engine light on
- Poor fuel economy
- Engine hesitation
- Reduced engine power
Common causes
- Wiring shorted to ground
- Regulator coil internal short
- Corroded connector pins
How to check it yourself
- Inspect wiring for damage or shorts
- Check connector pins for corrosion
- Test regulator coil resistance
Can I keep driving?
The car can be driven, but it may experience reduced performance and fuel efficiency.
General guidance, not a professional inspection. Confirm faults with measurements before buying parts, and use a qualified mechanic for brakes, steering, fuel leaks, airbags, and other safety-critical work. Terms and disclaimer