Fault code P0206 – a step-by-step guide to diagnosing and fixing it

Error code P0206 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system has detected a fault in the injection valve circuit of cylinder 6. This DTC (Diagnostic Trouble Code) indicates a problem with the electrical connection or the injection valve itself. The exact designation may vary for different manufacturers, but the fault code always refers to the sixth cylinder.

What causes can this fault code have?

• Defective injection valve on cylinder 6
• Damaged or corroded cable to the injection valve
• Loose or corroded plug connections
• Defective engine control unit (ECU)
• Short circuit in the wiring
• Open circuit in the injection valve wiring harness
• Defective fuse in the injection circuit

What symptoms occur in parallel with fault code P0206?

• Engine running unevenly: The engine runs unevenly or jerks when idling
• Loss of power: Noticeable reduction in engine power
• Increased fuel consumption: Consumption increases noticeably
• Starting problems: The vehicle is more difficult to start
• Exhaust problems: Black smoke from the exhaust
• Misfiring: Irregular combustion in the affected cylinder

How can the problem with error code P0206 be resolved?

• The elimination of trouble code P0206 requires a systematic diagnosis of the injection system.
• Replacement of the defective injector on cylinder 6 after checking it with a multimeter
• Repair or replace damaged cables in the injection valve wiring harness with professional cabling
• Clean and secure all plug connections on the injection valve with contact spray
• Checking and, if necessary, replacing the associated fuses in the engine compartment
• Diagnosis and repair of short circuits in the electrical wiring using a circuit diagram
• Replacement of the engine control unit if an ECU defect is confirmed after all other causes have been ruled out