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U1040 Diagnostic Trouble Code Discussion for May 2010

Lost Communication With Antilock Brake System Module

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Trouble Ticket Help Requests for DTC U1040
Help Request Posted
1999 Cadillac DeVille 4.6L Stall VIN: 1G6KD54Y1X
U1040: Lost Communication With Antilock Brake System Module. The car runs fine when it is cold, but when the temp gets to N.O.T. it has a tendency to cut off when you come to a stop. The ipc temperature reading is indicating 220F, but direct temperature reading is at water outlet is reading about 215F. We also replaced ...
May 25, 2010