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U1000 Diagnostic Trouble Code Discussion for November 2007

Class 2 Communication Malfunction

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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2000 Chevrolet Cavalier LS 2.4L No Start VIN: 1G1JF52T1Y
U1000: Class 2 Communication Malfunction. ... car would start and stall, then crank and no start, had car towed. Engine will run by adding fuel to throttle body. Injector pulse width ranges near 1.8-2.2 ms, found that by disconnecting MAP sensor pulse width goes to around 7.0 ms and car starts, althou...
November 08, 2007