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Home >> Buick >> 2021 >> Envision Essence, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications - Diagnostic Information And Procedures (1 Of 2) >> Diagnostic Information and Procedures >> DTC U007B >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON/Vehicle In Service Mode.
  2. Verify DTC U007B is not set.
    • Go to next step: If the DTC is not set 
  3. All OK.
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