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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 Description

Circuit/System Description

When the ignition is turned ON, the body control module (BCM) verifies the key information is correct and sends the information to the engine control module (ECM). If the key information is incorrect the ECM prohibits the vehicle from starting and sets the DTC.

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