Fault code P0005 – a step-by-step guide to diagnosing and fixing it

Error code P0005 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system has detected a fault in the fuel shut-off valve control circuit "A". This DTC P0005 indicates a problem with the electrical connection or the fuel shut-off valve itself, which regulates the fuel flow to the engine.

What can cause this error code?

• Defective fuel shut-off valve
• Damaged or corroded wiring harness to the valve
• Loose or corroded plug connections
• Short circuit in the wiring
• Defective engine control unit (ECM)
• Faulty fuse in the fuel shut-off valve circuit
• Faulty earth connection
• Overheating of the valve due to overload

What symptoms occur in parallel with fault code P0005?

• Starting problems: The vehicle is difficult or impossible to start
• Irregular idling: Engine runs unevenly or stutters when idling
• Sudden stalling: Engine stalls while driving
• Reduced engine power: Noticeably less power when accelerating
• Increased fuel consumption: Significantly higher consumption than usual
• Exhaust problems: Black or white smoke from the exhaust

How to fix the problem of trouble code P0005?

• Repairing trouble code P0005 requires a systematic diagnosis and appropriate measures.
• Replacing the defective fuel shut-off valve with a new original spare part and checking that it functions correctly
• Repair or replace the damaged wiring harness between the ECM and fuel shut-off valve, including insulation
• Cleaning and securing all plug connections with contact spray and checking for tight fit
• Localization and repair of short circuits in the wiring using a multimeter measurement
• Replacing the defective fuse in the fuel shut-off valve circuit and investigating the cause
• Repairing or replacing the ground connection to the fuel shut-off valve with corrosion-resistant materials
• Replacement of the engine control unit in the event of irreparable internal defects after prior diagnosis