Error code

OBD2 P0001

OBD2P0001
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Fuel Volume Regulator Control Circuit/Open.

Severity

highThe vehicle may be drivable but should not be driven for extended periods as it can cause further damage.

Summary

P0001 indicates an issue with the fuel volume regulator control circuit in the diesel engine's high-pressure pump. This code suggests that there is an open circuit preventing proper operation of the fuel volume control valve (FVCV).

Symptoms

  • Lack of power
  • No start condition

Common Causes

  • Faulty fuel volume control valve (FVCV)
  • Fault in the FVCV circuit
  • Problem with the PCM

Diagnosis

  1. Perform a visual inspection of the FVCV and connection.
  2. Test the FVCV solenoid using a current probe or multimeter to check resistance values.
  3. Check the circuit by disconnecting the FVCV connector and testing for proper power supply and PCM grounding.

Fixes

  • Replace faulty fuel volume control valve (FVCV) if necessary.

FAQ

What does P0001 mean?

P0001 indicates an issue with the fuel volume regulator control circuit, specifically that there is an open circuit preventing proper operation of the FVCV.

How do I diagnose P0001?

Diagnose by visually inspecting the FVCV and its connections, testing the solenoid with a multimeter or oscilloscope, and checking the circuit for proper power supply and PCM grounding.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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