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P0446 Diagnostic Trouble Code Discussion for December 2005

EVAP Vent System Performance


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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
2000 Cadillac DeVille DHS 4.6L MIL Lamp on VIN: 1G6KE57Y7Y
P0446: EVAP Vent System Performance. HEY GUYS, GOT A SICK CADDI HERE, CODE PO446 I'M USING OTC SCAN EQUIPTMENT, DON'T HAVE ACCES TO A SCANNER THAT WILL RUN EVAP TEST. LOOKING AT DATA STREAM FUEL TANK PRESSURE VOLTAGE IS 1.45V KOEO GAS CAP REMOVED, BUT FUEL TANK PRESSURE READS 539.05 in H2O, ALLDA...
December 08, 2005
2000 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52JXY
P0446: EVAP Emission Vent System Performance. This Buick is setting this vent code because the tank pressure is reading very strangly on my OTC scanner. I get readings varying from -58000in to - [...]! I haven't had much time to work on this yet but I did pop a new tank pressure sensor, but that made no d...
December 12, 2005