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Home >> Buick >> 2015 >> Verano Premium, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls And Fuel - 2.4L (Lea) - DTC P0335 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0443, P0458, or P0459: Evaporative Emission (EVAP) Purge Solenoid Valve Control Circuit >> 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 10-30 Ω between the control terminal B or 2 and the ignition circuit terminal A or 1.
    • If not between 10-30 Ω 

      Replace the Q12 Evaporative Emission Purge Solenoid Valve.

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

Dynamic Test

  1. Ignition OFF, disconnect the harness connector at the Q12 Evaporative Emission Purge Solenoid Valve.
  2. Install a 3 A fused jumper wire between the ignition, terminal A or 1 and 12 V. 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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