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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 231 (HVAC - Automatic) >> Diagnostic Information and Procedures >> DTC B2A1A-B2A1D (LF4) >> 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. Ignition ON.
  2. Verify DTC B2A1D is not set.
    • If the DTC is set 

      Replace the A26 Heater and Air Conditioning User Interface Controls - Front.

    • Go to next step: If the DTC is not set 
  3. A fault is not currently present and may be an intermittent condition.
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