Fault code P0230 – a step-by-step guide to diagnosing and fixing it

Error code P0230 is displayed and the check engine light is on - what does this mean?

DTC P0230 is recognized by the OBD/EOBD system when a problem is detected with the fuel pump primary circuit. This fault code indicates a fault in the electrical control circuit of the fuel pump, which is responsible for supplying fuel to the engine.

What can cause this fault code?

• Defective fuel pump relay
• Blown fuse in the fuel pump circuit
• Damaged cable between control unit and fuel pump
• Loose or corroded plug connections
• Faulty fuel pump
• Faulty engine control unit (ECM/PCM)
• Interrupted ground connection
• Defective fuel pressure sensor

What symptoms occur in parallel with fault code P0230?

• Starting problems: The vehicle is difficult or impossible to start because the fuel supply is impaired. Engine misfires: The engine runs unevenly or stops while driving. Loss of power: Noticeable reduction in engine power, especially when accelerating. Stuttering engine: Uneven engine running at idling speed or under load. Complete engine standstill: In severe cases, the engine may stop completely while driving.

How can the problem with error code P0230 be rectified?

• Repairing trouble code P0230 requires a systematic check of the fuel pump system.
• Check the fuel pump relay and replace if defective, as this is the most common cause of this fault code
• Check the fuse of the fuel pump circuit and replace the defective fuse
• Check electrical connections and cables between ECM and fuel pump for damage and repair
• Clean the plug connections on the fuel pump and relay and connect them securely
• Test fuel pump for proper function and replace completely if defective
• Diagnose the engine control unit (ECM) and reprogram or replace if necessary