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Home >> GMC >> 2024 >> Terrain SLT, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Automatic Transmission - 6T40 (MNH) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P171A-P171C >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2024 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:

Refer to Parking Brake and Drive Wheels Warning .

  1. Engine idling, transmission in Park.
  2. Verify DTC P171A, P171B, or P171C does not set when commanding the Auto start/stop Stop and Start commands with a scan tool.
    • If P171A, P171B, or P171C DTC sets 

      See Circuit/System Testing.

    • Go to next step: If P171A, P171B, or P171C DTC does not set 
  3. Operate the vehicle under Conditions for Running the DTC. Or operate the vehicle under the conditions found in Freeze Frame Status/Failure Records data.
  4. Verify no DTCs are set.
    • If the DTC does set 

      See Circuit/System Testing.

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