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Home › Chevrolet › 2017 › City Express LS › Repair and Diagnosis › Body & Frame › Ignition Switch/Steering Lock › Immobilizer System › Diagnostic Information And Procedures › DTC B2193 Or P1612: Lost Communication With Engine Control Module › Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC B2193 or P1612 is not set.
    • If DTC B2193 or P1612 is set, replace the K9 Body Control Module 
    • Go to next step: If DTC B2193 or P1612 is not set 
  3. Start the vehicle.
    • If the vehicle starts 
    1. All OK.
    • If DTC B2193 or P1612 is set, replace the K20 Engine Control Module. 
    • Go to next step: If DTC B2193 or P1612 is not set 
  4. All OK
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