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B1021 Diagnostic Trouble Code Discussion for January 2011

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 VIN: 1G1JC1244W
B1021: loss of pcm serial data. This car originally came in for a no start, replaced ignition module and crank sensor and plugs and wires. Came back 2 months later for intermittent no start. If we leave it outside it will sometimes not start then we bring it into the shop and start testing a...
January 27, 2011