DTC U0423-81: Invalid Data Received from Instrument Panel Cluster Control Module Invalid Serial Data Received [12/2021 - ]: Procedure

1. Check for DTCs.

   HINT: 

   If DTC U0423-81 is output by the dynamic radar cruise control system, perform troubleshooting for the meter/gauge system.

   Body Electrical > Combination Meter > Trouble Codes 

   Result

   Result	Proceed to
   Meter/gauge system DTCs are not output	A
   Meter/gauge system DTCs are output	B

Result: 

A 

REPLACE ECM. Refer to  REMOVAL [12/2021 - ] 

Result: 

B 

GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ]