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P1442 Diagnostic Trouble Code Discussion for September 2004

EVAP Vacuum Switch Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1442
Help Request Posted
1995 GMC Sonoma SL 4.3L MIL Lamp on VIN: 56S8512738
P1442: Evap switch high. This truck came to me with the mil on and the three codes mentioned. When I clear the codes it can take as much as 500 miles for the mil to come back on. The owner has no drivabillity complaints. Yesterday I peeled the insulation back from the main wire harnes...
September 29, 2004