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B3935 Diagnostic Trouble Code Discussion for May 2015

Transponder Authentication Error

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Trouble Ticket Help Requests for DTC B3935
Help Request Posted
2008 Chevrolet Express 1500 5.3L No Start VIN: 1GCFG15438
B3935: transponder authentication error. ... condition. Get error message service deterent system on instrument cluster. Not sure if key or theft deterent module. In learned key data it shows in valid key no and transponder key not present but sometime it show present. Tried 30 minute relearn and doe...
May 25, 2015