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P0540 Diagnostic Trouble Code Discussion for April 2005

Intake Air Heater Feedback Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0540
Help Request Posted
2002 GMC Sierra 2500 HD SL 6.6L MIL Lamp on VIN: 1GTHK29182
I can delete the code with my scan tool and it may stay off for a day or two. I checked that the signal heater wire from the relay is hot when the MIL light is not coming on (like after I have initially deleted the DTC)I do not have a Tech II scan tool and wou...
April 05, 2005