U0140 Code: Meaning, Causes, and Symptoms | OBD2 Codes
U0140 – Lost Communication With Body Control Module
U0140 Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
U0140 Possible Causes
Communication error,Faulty Body Control Module (BCM),Body Control Module (BCM) harness is open or shorted,Body Control Module (BCM) circuit poor electrical connection
The Powertrain Control Module (PCM) continuously monitors Controller Area Network (CAN) for messages from Body Control Module (BCM). The U0140 code sets when the PCM does not receive the BCM message within the defined amount of time.