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U1040 Diagnostic Trouble Code Discussion for September 2009

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 no guages, lost comm VIN: 3G7DB03EX3
U1040: Lost Communication with EBCM. Guages inop (except Speedo) Odometer reads error. Shifter stuck in park. Backup lights inop. Someone before me has installed an external start button. The vehicle starts and runs fine. I cannot access the PCM using my Genisys. I connected with the other module...
September 03, 2009
2003 Pontiac Aztek 3.4L no guages, lost comm VIN: 3G7DB03EX3
U1040: Lost Communication with EBCM. Guages inop (except Speedo) Odometer reads error. Shifter stuck in park. Backup lights inop. Someone before me has installed an external start button. The vehicle starts and runs fine. I cannot access the PCM using my Genisys. I connected with the other module...
September 03, 2009