U0400-81: Invalid Data Received - Invalid serial data received: Action

NOTE: This is not a vehicle harness issue or chassis control module issue. The data source module has sent information which is not correct.

Using the Jaguar Land Rover approved diagnostic equipment, check the snap shot data to determine the invalid data source control module. Check datalogger signal - Network Operating System ECU Local Signal Handle (0xD020). Check the relevant control for related DTCs and refer to the relevant DTC index