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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0446-DTC P31BF And Symptoms) >> Diagnostic Information and Procedures >> DTC P0497 >> Circuit/System Testing

Circuit/System Testing

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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.

    • Go to next step: 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.

    • Go to next step: If within specified range 
  5. All OK
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