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P0442 Diagnostic Trouble Code Discussion for May 2005

EVAP System Small Leak Detected

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Trouble Ticket Help Requests for DTC P0442
Help Request Posted
2000 Pontiac Grand Am SE 3.4L MIL Lamp on VIN: 1G2NF52E2Y
P0442: EVAP System Small Leak (0.040") Detected. ... keeps setting a p0442 code for evap small leak. Each time I check it out I can draw a vaccum on the evap system and it will hold it all day. I'm not sure why the scan tool reads a negative vaccum for the fuel tank pressure. But the voltage from the ftp sen...
May 07, 2005