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DTC P0446 - EVAP System Canister Vent Blocked: Or

No IAT, MAP, ODM, or TP sensor DTCs set.
DTC P0442 test passed.
Normal EVAP system operation is commanded (EVAP vent solenoid open, EVAP purge solenoid normal).
Fuel tank pressure less than -10 in. H2O.
Listed conditions present for 30 seconds.