Fuel Volume Regulator Control Circuit Range/Performance
The Powertrain Control Module (PCM) monitors the fuel volume regulator to ensure the correct amount of fuel is delivered to the high-pressure fuel pump. Code P0002 is set when the PCM detects that the electrical signals from the fuel volume regulator control circuit fall outside the expected operating range or perform incorrectly.
This code is considered high severity because improper fuel volume can lead to engine stalling, a no-start condition, or sudden loss of power while driving. It should be diagnosed and repaired immediately to ensure vehicle safety and prevent fuel system damage.
Common symptoms
- Illuminated Check Engine Light
- Engine stalling or hesitation during acceleration
- Hard starting or extended cranking time
- Noticeable lack of engine power
- Vehicle entering limp-home mode
Likely causes
- Faulty fuel volume regulator (FVR) valve
- Corroded, damaged, or loose wiring and connectors in the FVR circuit
- Clogged or restricted fuel filter
- Failing high-pressure fuel pump
- Faulty Powertrain Control Module (PCM)
What to check before replacing parts
Visually inspect the wiring harness and connectors at the fuel volume regulator.
Look for: Look for chafed wires, melted insulation, corrosion on the pins, or loose connections that could cause high electrical resistance.
Use a scan tool to monitor commanded versus actual fuel rail pressure.
Look for: If the actual fuel pressure significantly lags or exceeds the commanded pressure during acceleration, the regulator or pump is failing to control volume.
Test the resistance of the fuel volume regulator solenoid using a digital multimeter.
Look for: Compare the measured ohms to the manufacturer's specification; an open circuit (infinite resistance) or short indicates a failed regulator.
Test the low-pressure fuel supply system with a mechanical gauge.
Look for: Ensure the lift pump is delivering adequate and steady base fuel pressure to the high-pressure pump, as starvation can mimic a regulator fault.
Check the fuel filter and lines for restrictions or contamination.
Look for: Look for metal flakes, debris, or severe clogs in the filter housing that would restrict fuel volume before it reaches the regulator.
This page explains the generic P0002 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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