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P0645 Diagnostic Trouble Code Discussion for December 2009

A/C Clutch Relay Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0645
Help Request Posted
2004 Pontiac Grand Am SE1 3.4L No Start VIN: 1G2NF52E84
P0645: A/C Clutch Relay Control Circuit Malfunction. ... again, said same problem as before (2 days ago). Cranks, won't start. Towed back in. Tested as before, found no injector pulse, has spark. Changed module with known good unit (our test part) and no change. Followed all test procedures through all data. Rep...
December 28, 2009