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U1000 Diagnostic Trouble Code Discussion for May 2012

Class 2 Communication Malfunction

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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2003 Chevrolet Malibu LS 3.1L No Start VIN: 1G1NE52J83
U1000: Class 2 Communication Malfunction. ... lock data was invalid, after clearing code u1000, engine started and ran. no codes in bcm, abs, or srs, u1000 shows up on engine and trans only. can't find iny info on this code. mitchel shows a code u2000, are they one and the same?
May 02, 2012
2000 Oldsmobile Alero GLS 3.4L No Start VIN: 1G3NF12E8Y
U1000: Class 2 Communication Malfunction. Vehicle has an intermitten no start. When problem occurs, "service engine soon" indicator does not illuminate. When "SES" indicator does illuminate, vehicle will start. Vehicle may start 5 - 10 times with no problem, then problem will occur. Ve...
May 18, 2012