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P0446 Diagnostic Trouble Code Discussion for May 2004

EVAP Vent System Performance


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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
1999 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K1X
P0446: EVAP Emission Vent System Performance. this car would go nuts when we first got it. on the test drive it would buck, surge, trailerhitch, fishbite, chuggle, and everything else -- consistantly intermittant. We scoped the maf, and had good power, and ground. the signal output or frequency output was...
May 03, 2004
1999 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K1X
P0446: EVAP Emission Vent System Performance. this car would go nuts when we first got it. on the test drive it would buck, surge, trailerhitch, fishbite, chuggle, and everything else -- consistantly intermittant. We scoped the maf, and had good power, and ground. the signal output or frequency output was...
May 03, 2004