DTC U0401-81: Invalid Data Received From ECM/PCM - Invalid serial data received: Action
NOTE:
- This is not a vehicle harness issue or anti-lock brake system control module issue. The data source module has sent information which it has marked as Invalid
- Do NOT replace the anti-lock brake system control module for this DTC only
- Using the Jaguar Land Rover approved diagnostic equipment, check the powertrain control module for related Diagnostic Trouble Code(s) and refer to the relevant DTC index
- Using the Jaguar Land Rover approved diagnostic equipment, clear the Diagnostic Trouble Code(s) and perform routine - On Demand Self Test (0x0202) for the powertrain control module
- Perform an ignition cycle, clear the DTC and retest, if the problem persists contact JLR technical assistance