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Home >> Buick >> 2019 >> Encore Base >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information and Procedures >> DTC B3976 >> Circuit/System Verification
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Circuit/System Verification

  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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