What's the 05658 vw code?

The VW 05658 error code indicates a problem with one of the diesel engine's glow plugs. Specifically it refers to the circuitry of the glow plug for cylinder 1. When a plug fails to heat up an engine's cylinder head on a cold start, the 05658 code might be thrown. Signs the VW's glow plugs are defective include hard starting as the engine fails to warm to operating temperatures; engine mIS Fires due to a lack of compression and injection pressure; white or black smoke from the exhaust; poor fuel economy and rough idling. The average cost to replace one of the Volkswagen's glow plugs ranges between $270-$315 in parts and labor.