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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 214 (Electronic Transmission Range Select) >> Diagnostic Information and Procedures >> DTC P07B3-P07B5, P07B9-P07BB, P07BE, P082A-P082F, P089B-P089D, P08A0-P08A2, P15FE, P17A3-P17A9, P17D8-P17DC, P17F3, P17F4, P187F, P188A, P189D, or P18EC >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify all other Transmission related faults are not present.
    • Go to next step: If Transmission related faults are not present 
  2. Verify the K20 Engine Control Module software is up to date.
    • If software is not up to date 

      Program the K20 Engine Control Module.

    • Go to next step: If software is up to date 
  3. Verify none of the DTCs set.
    • If DTCs set 

      Replace the K212 Gear Shift Control Module

    • Go to next step: If DTCs are not set 
  4. Verify none of the DTCs set while operating the vehicle within the Conditions for Running the DTC.
    • If DTCs set 

      Replace the K20 Engine Control Module

    • Go to next step: If DTCs do not set 
  5. All OK.
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