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P0418 Diagnostic Trouble Code Discussion for September 2007

Secondary AIR System Pump Relay Control Circuit Malfunction (Bank 1)

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Trouble Ticket Help Requests for DTC P0418
Help Request Posted
2002 Volkswagen Cabrio GLX 2.0L Poor Fuel Economy, MIL Lamp on VIN: 3VWDC21VX2
P0418: Secondary air injection relay A circuit low voltage. Vehicle came in from another shop with code P0445, Evaporative emission purge control valve circuit shorted and several pending codes. Tested valve, no faults found, cleared codes and drove car. Within 24 hours, car had re-set codes and set codes as outlined a...
September 19, 2007