Severity: Fix within days. Drive with caution and watch for new symptoms.
The computer found a fault in the circuit that heats the glow plugs, which diesel engines need to start when cold.
Test each glow plug and the relay, then replace the faulty part.
Hard cold starts and rough running until warm. The engine usually still runs once started.
You can drive short distances carefully; watch for worsening symptoms. Hard cold starts and rough running until warm. The engine usually still runs once started.
The most common causes are: Failed glow plug; Failed glow plug relay; Damaged wiring; Blown fuse. A scan tool and a visual check of the parts above is where a technician starts.
Test each glow plug and the relay, then replace the faulty part.
