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P1621 Diagnostic Trouble Code Discussion for March 2008

Control Module Long Term Memory Performance


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Trouble Ticket Help Requests for DTC P1621
Help Request Posted
2003 Chevrolet Silverado 2500 HD 6.6L No Start, MIL Lamp on VIN: 1GCHK29163
P1621: Control Module Ignition Off Timer Performance. ... this truck and a pile of loss of communication codes, we have checked wiring and relays, but everthing looks ok ! but before we start changing box's, has anyone seen this problem before. the trouble code tree for p1621 leads...
March 11, 2008
2003 Chevrolet Silverado 2500 HD 6.6L No Start, MIL Lamp on VIN: 1GCHK29163
P1621: Control Module Ignition Off Timer Performance. ... this truck and a pile of loss of communication codes, we have checked wiring and relays, but everthing looks ok ! but before we start changing box's, has anyone seen this problem before. the trouble code tree for p1621 leads...
March 11, 2008