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Home >> Buick >> 2019 >> Regal TourX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 139 (Engine Controls And Fuel - 3.6L (LGX) - Diagnostic Information And Procedures (P0449-P3436) And Symptoms) >> Diagnostic Information and Procedures >> Service Bay Test >> Test Procedure

Test Procedure

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • If the Service Bay Test aborts or fails, a DTC will NOT be set.
  • You must not rush the scan tool selections or erroneous results or error messages could occur.
  1. Select the Service Bay Test with the scan tool.
    2. WARNING:

    Refer to Road Test Warning .

  2. Follow the instructions on the scan tool. The EVAP Service Bay Test should complete and should not abort or fail.
    • If the test aborts 

      Correct the condition for running the test, then retest.

      or

    • If the test fails 

      Repair the vehicle for the condition indicated by the failure message, then retest.

    • Go to next step: If the test passes 
      NOTE:

      There are several test parameters displayed and can vary by engine RPO.

  3. Verify that the EVAP Monitor Complete parameter, is set to YES.
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