Fault code P0006 – a step-by-step guide to diagnosing and fixing it

Error code P0006 is displayed and the check engine light is on - what does this mean?

The OBD system detects too low a voltage in the control circuit of the fuel cut-off valve. This DTC P0006 indicates a problem with the electrical circuit that controls the fuel cut-off valve, which regulates the fuel flow to the injection pump.

What can cause this error code?

• Defective fuel cut-off valve
• Damaged or corroded cable in the control circuit
• Loose or corroded plug connections
• Short circuit to ground in the wiring harness
• Defective engine control unit (ECM)
• Blown fuse in the fuel cut-off circuit
• Poor ground connection at the valve

What symptoms occur in parallel with fault code P0006?

• Starting problems: The vehicle is difficult or impossible to start
• Engine stalls: Sudden stalling of the engine while driving
• Irregular idling: Engine runs irregularly at idle speed
• Loss of power: Reduced engine power when accelerating
• Check engine light: Continuously lit or flashing warning light
• Emergency running program: Engine runs in reduced safety mode

How can the problem with error code P0006 be rectified?

• The repair requires a systematic diagnosis of the fuel cut-off valve control circuit.
• Inspection and replacement of the defective fuel cut-off valve including seals and electrical connections
• Complete check of the wiring harness with a multimeter for continuity, short circuits and insulation faults, followed by repair or replacement of damaged cables
• Cleaning all plug connections with contact spray and ensuring firm, corrosion-free connections
• Checking and replacing blown fuses in the fuel system and investigating the cause of the fuse failure
• Checking the ground connections on the valve and engine, cleaning the contact points and tightening the screws
• Diagnosis of the engine control unit using professional software and replacement or reprogramming if necessary