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Home >> Cadillac >> 2015 >> CTS V, Automatic Trans >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission - 6L90 (MYD) - Diagnostic Information And Procedures (Coupe) >> Diagnostic Information and Procedures >> DTC P0601, P0603, P0604, or P062F: Control Module Memory >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition OFF for one minute. Ignition ON.
  2. Verify with a scan tool that DTC P0601, P0603, P0604, or P062F is not set.
    • If any of the DTCs set 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If none of the DTCs set 
  3. 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.
  4. Verify the DTC does not set.
    • If the DTC sets 

      Replace the Q8 Control Solenoid Valve Assembly

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