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Home >> Buick >> 2020 >> Envision Preferred, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 111 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC B3976 >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2018 Buick Regal TourX and 2018 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the engine starts with each available key.
    • If the engine does not start with a key 

      Replace the key.

    • Go to next step: If the engine starts with all keys 
  2. All OK.
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