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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P187E, P18AA, P18AB, P18AC, P18AD, P18AE, P27EC Or P27F0: Transmission Park Valve Stuck Off/Transmission Range Control Valve 1-2 Position Switch/Transmission Range Control Enable Valve Stuck Off >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Verify the condition does not exist: Incorrect fluid level or condition - Transmission - Refer to Transmission Fluid Level and Condition Check 
    • If a condition exists 

      Repair or replace as necessary.

    • Go to next step: If no condition exists 
  2. DTCs related to the following system/component = Not Set
    • B315A Transmission Range Control Valve 1 Position Switch
    • B315B Transmission Range Control Valve 2 Position Switch
    • B316 Transmission Park Valve Position Switch
    • Go to next step: If a related DTC is not set 
  3. Ignition - On/Vehicle - In Service Mode
  4. Clear DTCs
  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.

    Verify DTC P187E, P18AA, P18AB, P18AC, P18AD, P18AE, P27EC, P27F0, P27EB, P27ED, P27EE, P27EF, P27F1, P27F2 is not set.

    • Go to next step: If none of the DTCs are set 
  6. All OK.