P0002 — Fuel Volume Regulator Control Circuit Range/Performance
Moderate severityWhat it means
P0002 is stored when the engine control unit sees a fault involving the fuel volume regulator control circuit. The fuel volume regulator controls how much fuel the high-pressure pump delivers to the rail, so faults here directly change fuel pressure. A “range/performance” fault means the value is present but implausible — it does not agree with other sensors or expected conditions.
Common symptoms
- Readings that drift or disagree with related sensors
- Hard starting or long cranking
- Power loss or limp mode under load
- Stalling in some cases
Likely causes
- Drifting, contaminated or aged sensor
- A mechanical issue skewing the reading
- Faulty fuel volume regulator
- High-pressure pump or pressure-sensor fault affecting the circuit
What to check first
- Cross-check the reading against related sensors in live data on a cold start
- Compare commanded vs actual fuel-rail pressure in live data
- Inspect the regulator connector and pump wiring
Can you keep driving?
Fuel-pressure faults can leave you stranded or trigger limp mode — diagnose it before relying on the car.
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