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B1021 Diagnostic Trouble Code Discussion for March 2007

Loss of PCM serial data


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Trouble Ticket Help Requests for DTC B1021
Help Request Posted
1998 Chevrolet Cavalier 2.2L No Start, Cuts out, Stall VIN: 1G1JC1249W
B1021: Loss of PCM serial data. ... start. Sat inside all weekend and was a no start first thing this morning. I had no spark and was unable to hear fuel pump, maybe just too much noise in shop. I was in proccess of hooking up my fuel pressure gauge and heard a relay click and heard fuel pum...
March 12, 2007
1998 Chevrolet Cavalier 2.2L No Start, Cuts out, Stall VIN: 1G1JC1249W
B1021: Loss of PCM serial data. ... start. Sat inside all weekend and was a no start first thing this morning. I had no spark and was unable to hear fuel pump, maybe just too much noise in shop. I was in proccess of hooking up my fuel pressure gauge and heard a relay click and heard fuel pum...
March 12, 2007