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P1601 Diagnostic Trouble Code Discussion for December 2010

PCM Serial Communications Malfunction


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Trouble Ticket Help Requests for DTC P1601
Help Request Posted
1996 Pontiac Sunfire SE 2.2L No Start VIN: 3G2JB1248T
P1601: Loss of serial communication. ... no start. He had already replaced plugs wires coils etc.I Scanned and found invalid key code. installed new passlock & tumbler all was good. Next morning get call that car will not start. Towed it in and right away noticed all dash idiot lights stay on...
December 10, 2010
1996 Pontiac Sunfire SE 2.2L No Start VIN: 3G2JB1248T
P1601: Loss of serial communication. ... no start. He had already replaced plugs wires coils etc.I Scanned and found invalid key code. installed new passlock & tumbler all was good. Next morning get call that car will not start. Towed it in and right away noticed all dash idiot lights stay on...
December 10, 2010