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P0640 Diagnostic Trouble Code Discussion for August 2015

Intake Air Heater Control Circuit Malfunction


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Trouble Ticket Help Requests for DTC P0640
Help Request Posted
2008 Chevrolet Silverado 3500 HD LTZ 6.6L MIL Lamp on VIN: 1GBJC34638
P0640: Intake air heater. ... code which is intake air heater code and was a hard fault code. I replace the connectors at the glow plug module and at the intake air heater.i forgot to mention truck had been to dealer and had a new intake air heater and glow plug controller installed,cu...
August 13, 2015