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P0418 Diagnostic Trouble Code Discussion for October 2010

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

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Trouble Ticket Help Requests for DTC P0418
Help Request Posted
2001 Chevrolet Express 2500 5.0L Misfire VIN: 1GCFG25M41
P0418: Secondary Air System Pump Relay Control Circuit Malfunction (Bank 1). This van entered our vehicle donation program as a no start. The PCM case was split open with corrosion as were some some of the circuits inside. There was no communication. I installed a used PCM. After learning the key the van ran with a dead miss but no mis...
October 01, 2010