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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P205B - P2BAA) And Symptoms) >> Diagnostic Information And Procedures >> DTC P20E8 Or P20E9: Reductant Low/High Pressure >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition - On/Vehicle - In Service Mode
  2. Verify there are no related DTCs set in the following system:Reductant System
    • Go to next step: If no other DTCs are set 
  3. Verify that the scan tool Reductant Level is displaying at least 33%.
    • If less than 33% 

      Add reductant

    • Go to next step: If 33% or greater 
    4. NOTE:

    The reductant must be thawed before continuing.

  4. Command the Reductant System Leak Test On with a scan tool. Allow the pressure to build for at least 2 minutes. The first 60 s, the system performs a system purge. Observe the scan tool Reductant Pressure sensor parameter. The reading should be between 400-650 kPa (58-94 psi).
    • If not between the specified values 

      Refer to Circuit/System Testing

    • Go to next step: If between the specified values 
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  6. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • Go to next step: If the DTC does not set 
  7. All OK.
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