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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Automatic Transmission - 6T40 (MNH MNK) Or 6T45 (MHG) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P0711, P0712, Or P0713: Transmission Fluid Temperature Sensor >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Engine idling at the normal operating temperature.
  2. Verify the scan tool Transmission Fluid Temperature parameter increases greater than 2°C (3.6°F) after operating the vehicle at 64 km/h (40 mph) for 10 min.
    • If the temperature does not increase greater than 2°C (3.6°F) 

      Replace the Q8 Control Solenoid Valve Assembly.

    • Go to next step: If the temperature increases greater than 2°C (3.6°F) 
  3. Verify the scan tool Transmission Fluid Temperature and the TCM Temperature parameters are within 20°C (36°F).
    • If the temperatures are not within 20°C (36°F) 

      Replace the Q8 Control Solenoid Valve Assembly.

    • Go to next step: If the temperatures are within 20°C (36°F) 
  4. 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.
  5. Verify the DTC does not set.
    • If the DTC sets 

      Replace the Q8 Control Solenoid Valve Assembly.

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