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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Controls And Fuel - 2.4L - DTC P0114 To DTC P0604) >> Diagnostic Information and Procedures >> DTC P0443, P0458, or P0459: Evaporative Emission (EVAP) Purge Solenoid Valve >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.

Static Test

  1. Ignition OFF, disconnect the harness connector at the Q12 Evaporative Emission Purge Solenoid Valve.
  2. Test for 10-30Ω between the control terminal B or 2 and the ignition circuit terminal A or 1.
    • If not between 10-30Ω  

      Replace the Q12 Evaporative Emission Purge Solenoid Valve.

    • If between 10-30Ω  
  3. All OK.

Dynamic Test

  1. Ignition OFF, disconnect the harness connector at the Q12 Evaporative Emission Purge Solenoid Valve.
  2. Install a 3A fused jumper wire between the ignition, terminal A or 1 and 12V. Install a jumper wire between the control terminal B or 2 and ground.
  3. Verify the Evaporative Emission Purge Solenoid Valve turns on & off/clicks and flows vacuum.
    • If it does not turn on & off/click or flow vacuum. 

      Replace the Q12 Evaporative Emission Purge Solenoid Valve.

    • If it does turns on & off/clicks and flows vacuum. 
  4. All OK
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