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Home >> Cadillac >> 2015 >> CTS Base, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission - 6L45 (MYA) - Diagnostic Information And Procedures - Sedan >> Diagnostic Information and Procedures >> DTC P0667, P0668, or P0669: Control Module Temperature Sensor >> Circuit/System Verification
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Circuit/System Verification

  1. Engine idling at normal operating temperature.
  2. Verify the scan tool Transmission Control Module Temperature parameter is between -247 and +247°C (-412 and +477°F).
    • If not between -247 and +247°C (-412 and +477°F) 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If between -247 and +247°C (-412 and +477°F) 
  3. Verify the scan tool Transmission Control Module temperature parameter increases greater than 2°C (3.5°F) after operating the vehicle at 64 km/h (40 mph) for 10 minutes.
    • If the temperature does not increase greater than 2°C (3.5°F) 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If the temperature does increase greater than 2°C (3.5°F) 
  4. Verify the scan tool Transmission Control Module Temperature and the Transmission Fluid Temperature parameters are within 10°C (18°F) of each other.
    • If the temperature is not within 10°C (18°F) 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If the temperature is within 10°C (18°F) 
  5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observe from the Freeze Frame/Failure Records data.
  6. Verify the DTC does not set.
    • If the DTC sets 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If the DTC does not set 
  7. All OK.
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