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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Engine Controls Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P0446: EVAP Vent System Performance >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Sonoma and 2002 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic procedures.

  1. 4

    This step checks if the FTP sensor is functioning.
  2. 5

    This step checks if the condition is present.
  3. 6

    This step checks the EVAP vent valve electrical operation.
  4. 7

    This step checks for a restricted EVAP vent valve.
  5. 8

    This step checks if the restriction is in the EVAP canister or the vent hose.