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U1040 Diagnostic Trouble Code Discussion for July 2009

Lost Communication With Antilock Brake System Module

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Trouble Ticket Help Requests for DTC U1040
Help Request Posted
2003 Buick LeSabre Limited 3.8L MIL Lamp on VIN: 1G4HR54K73
U1040: Lost communication EBCM/EBTCM. This car came in yesterday. Sometimes it runs great and then the door chimes go off and the mil light comes on with the traction contorl light as well. When these lights are on the HVAC control head blacks out and the A/C is inoperable. When I first checked fo...
July 29, 2009