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U1000 Diagnostic Trouble Code Discussion for December 2004

Class 2 Communication Malfunction

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Trouble Ticket Help Requests for DTC U1000
Help Request Posted
2001 Oldsmobile Alero GLS 3.4L No Start VIN: 1G3NF52E51
U1000: Class 2 Communication Malfunction. ... problem similar to this, the car will crank but won't start,the security light will flash. I performed relearn procedure and then the car will start. Last time I replaced the passlock sensor and I thought I had it fixed. The problem is intermitent, I got t...
December 24, 2004