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P0640 Diagnostic Trouble Code Discussion for March 2010

Intake Air Heater Control Circuit Malfunction


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Trouble Ticket Help Requests for DTC P0640
Help Request Posted
1996 Buick Riviera 3.8L No Start VIN: 1G4GD2217S
P0640: qdm 1 fault. OK techs I have been fighting this problem for days now we have a customers 1996 buick riviera 3.8 super charged.The engine was replaced with a new one at 113829 miles. We have replaced the ecm all the coil packs, crank sensor we tested the cam sensor it teste...
March 08, 2010
1996 Buick Riviera 3.8L No Start VIN: 1G4GD2217S
P0640: qdm 1 fault. OK techs I have been fighting this problem for days now we have a customers 1996 buick riviera 3.8 super charged.The engine was replaced with a new one at 113829 miles. We have replaced the ecm all the coil packs, crank sensor we tested the cam sensor it teste...
March 08, 2010