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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 29 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0446 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0497: Evaporative Emission (EVAP) System No Flow During Purge >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
NOTE: Perform the Circuit/System Verification before proceeding with the Circuit/System Testing.
  1. The GE-41413-A  should still be installed from verification.
  2. Engine running, observe the vacuum gauge while commanding the EVAP Purge Solenoid Valve to Increase with the scan tool. Vacuum should be present from 10 - 100%.
    • If no vacuum is present 

      Test or replace the Q12 Evaporative Emission Purge Solenoid Valve.

    • If vacuum is present 
  3. Install the plug in the fresh air port performed in step 6 of circuit system verification.
  4. Observe the Fuel Tank Pressure parameter while commanding the EVAP Purge Solenoid Valve to Increase with the scan tool. The parameter should be greater than 1.50 V within 60 s.
    • If less than the specified range 

      Repair the blocked purge path or test or replace the Q12 Evaporative Emission Purge Solenoid Valve.

    • If within specified range 
  5. All OK
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