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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Rear Drive Axle - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC C1136 or C1137 >> 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 there are no other DTCs set in the K47 Differential Control Module.
    • Go to next step: If no other DTCs are set 
  2. Verify DTC C1136 or C1137 is not set.
    • If any of the DTCs are set 
    1. Ignition OFF
    2. Allow 30 minutes for the clutch to cool completely.
    3. Perform key cycle, ignition OFF then ON.
    4. Clear DTCs. Test drive vehicle and verify DTCs do not reset.
      • If the DTC sets

        Replace the K164 Differential Control Module

      • Go to next step: If the DTC does not set
    5. All OK.
    • Go to next step: If none of the DTCs are set 
  3. A fault is not currently present and may be an intermittent condition
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