P0002 — Fuel Volume Regulator A Control Circuit Performance

P0002: Fuel Volume Regulator A Control Circuit Performance — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Fuel Volume Regulator A Control Circuit Performance. Basic catalogue definition; diagnostic details have not yet been reviewed.

Affected system: Powertrain

Symptoms

  • The malfunction indicator lamp may illuminate.
  • Hard starting, rough running, loss of power or stalling can occur.
  • Some vehicles may limit engine output or use more fuel, depending on the actual fault.

Possible causes

  • Fuel-volume control actuator may respond incorrectly or stick.
  • Corroded terminals, open wires or shorts in the control circuit.
  • Power supply or ECU driver faults only after the circuit and actuator have been ruled out.

What to check

  • Read P0002 and companion DTCs, recording freeze-frame and triggering conditions.
  • Inspect the fuel-volume regulator connector and harness for corrosion or damage.
  • Compare requested and measured fuel pressure where supported by the vehicle and scan tool.
  • Check supply, command and circuit integrity using the OEM wiring diagram; do not energize the solenoid directly.
  • Test regulator function to manufacturer procedures; assess fuel supply before suspecting the ECU.
  • Following repair, repeat a controlled test and confirm the fault does not recur. High-pressure injection systems require proper safety procedures.

Also written as: P0002-00, P000200, PO002 (some scan tools add the fault-type byte, e.g. -00).