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P0440 Diagnostic Trouble Code Discussion for December 2009

General EVAP System Failure


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Trouble Ticket Help Requests for DTC P0440
Help Request Posted
2001 Pontiac Sunfire SE 2.2L MIL Lamp on VIN: 1G2JB12431
P0440: EVAP System Malfunction. ... evap system on this car, last week it came in with code P0440 we performed a smoke test and found that there wasn't any smoke coming out of the vent valve in the off position, tapped with a screwdriver heard it click and smoke came out( sticking vent valve...
December 01, 2009
2003 Chevrolet Trailblazer LS 4.2L cant fill fuel tank VIN: 1GNET16S33
P0440: EVAP System Malfunction. I had a po440 evap system malfunction found filler neck cracked on inlet of tank. tested evap purge valve ok. tested evap vent valve ok. all lines clear and holding vac when blocking of sections. tested evape sensor in tank normal readings at rest and applying...
December 12, 2009