DTC U0402-81: Invalid Data Received From TCM - Invalid serial data received: Action

NOTE:

This DTC is set when the transmission control switch has not received expected data from the transmission control module via the CAN bus.
Do not install a new transmission control switch unless directed to by Dealer Technical Support.

Using the manufacturer approved diagnostic system, check the transmission control module for related DTCs and refer to the relevant DTC index. If no DTCs are set in the transmission control module, contact Dealer Technical Support