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U0402 - Invalid Data Received From Transmission Control Module (TCM)

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U0402 - INVALID DATA RECEIVED FROM TRANSMISSION CONTROL MODULE (TCM)

Description:  The powertrain control module (PCM) continuously monitors the controller area network (CAN) for messages from the TCM. This DTC sets when the PCM does not receive the TCM message within the defined amount of time.
Possible Causes: 
  • Check the CAN circuits for an open
  • Check the CAN circuits for a short to ground
  • Check the CAN circuits for a short to voltage
Diagnostic Aids:  Check for other PCM DTCs or PCM related symptoms. Diagnose all other PCM DTCs or PCM related symptoms first. Check for other TCM DTCs or TCM related symptoms. Diagnose all other TCM DTCs or TCM related symptoms first.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
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