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Home >> Buick >> 2003 >> Century Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 3.1L Engine >> Diagnostic Tests >> DTC P0449: EVAP Vent Solenoid Control Circuit >> Test Description

Test Description

The numbers below refer to the step numbers in the diagnostic procedure.

  1. 2  - Listen or feel for a click when the EVAP vent solenoid operates. Ensure that both the ON and the OFF states are commanded. Repeat the commands as necessary.
  2. 5  - This step verifies that the PCM is providing ground to the EVAP vent solenoid.
  3. 6  - This step tests if the EVAP vent solenoid control circuit is grounded.

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