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P0446 Diagnostic Trouble Code Discussion for December 2013

EVAP Vent System Performance

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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
2000 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNCT18W9Y
P0446: EVAP Vent System Performance. ... EVAP system fixed on this Blazer. This all started out with a P0446 vent code. Tested the vent and it stuck as normal, so I replaced it with a Dorman piece. After that, it started throwing a P0442 (small leak) code. I looked in to the fuel tank pressure se...
December 17, 2013