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U1040 Diagnostic Trouble Code Discussion for June 2007

Lost Communication With Antilock Brake System Module


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Trouble Ticket Help Requests for DTC U1040
Help Request Posted
2003 Pontiac Aztek 3.4L Stall, Misfire, MIL Lamp on VIN: 3G7DB03EX3
U1040: Loss of class 2 communicationthis code was in the IPC. Thanks to everyone for looking at this request. The wrecker brought this vehicle in with a dead battery. The battery was recharged and the vehicle started and seemed to run ok at idle. We check charging voltage and sometimes it would be at 13.5 volts and then ...
June 04, 2007
2003 Pontiac Aztek 3.4L Stall, Misfire, MIL Lamp on VIN: 3G7DB03EX3
U1040: Loss of class 2 communicationthis code was in the IPC. Thanks to everyone for looking at this request. The wrecker brought this vehicle in with a dead battery. The battery was recharged and the vehicle started and seemed to run ok at idle. We check charging voltage and sometimes it would be at 13.5 volts and then ...
June 05, 2007
2003 Pontiac Grand Am SE2 2.2L No Start VIN: 1G2NF52F83
U1040: Lost Communication With Antilock Brake System Module. Hi guys Have this very intermittent car .It sometimes will not start .When i got it once not to start one of the three voltages from the paslock sensor located on the key tumbler housing.Re learned the system and everything was great for more than a week .Now ...
June 25, 2007
2003 Pontiac Aztek 3.4L Stall, Misfire, MIL Lamp on VIN: 3G7DB03EX3
U1040: Loss of class 2 communicationthis code was in the IPC. Thanks to everyone for looking at this request. The wrecker brought this vehicle in with a dead battery. The battery was recharged and the vehicle started and seemed to run ok at idle. We check charging voltage and sometimes it would be at 13.5 volts and then ...
June 04, 2007
2003 Pontiac Aztek 3.4L Stall, Misfire, MIL Lamp on VIN: 3G7DB03EX3
U1040: Loss of class 2 communicationthis code was in the IPC. Thanks to everyone for looking at this request. The wrecker brought this vehicle in with a dead battery. The battery was recharged and the vehicle started and seemed to run ok at idle. We check charging voltage and sometimes it would be at 13.5 volts and then ...
June 05, 2007
2003 Pontiac Grand Am SE2 2.2L No Start VIN: 1G2NF52F83
U1040: Lost Communication With Antilock Brake System Module. Hi guys Have this very intermittent car .It sometimes will not start .When i got it once not to start one of the three voltages from the paslock sensor located on the key tumbler housing.Re learned the system and everything was great for more than a week .Now ...
June 25, 2007