DTC U0140: Lost Communication With Body Control Module: Description

The PSCM monitors the HS-CAN bus when the ignition has been on for more than 5 seconds, when the voltage to the PSCM is greater than 9 volts and when there are no DTCs present that are inhibiting PSCM operation.

DTC U0140:00 (Lost Communication with the Body Control Module: No Sub Type Information) - This DTC sets when communication between the PSCM and the BCM module fails. If the power mode message is missing for 1 second(s) or if the vehicle configuration and information data is not transmitted to the PSCM from the BCM.