DTC Troubleshooting: U0029 (Gauge Control Module): Notes

DTC U0029  : F-CAN communication line error

How to use this service information .

NOTICE: 

• Before you troubleshoot, review the How to Troubleshoot .
• Troubleshoot the following DTCs first, if stored at the same time.
• • -

    Network Communications [CAN Gateway]: DTC U008A-00 - Refer to: DTC Troubleshooting: U008A-00(CAN Gateway) (2025) or DTC Troubleshooting: U008A-00(CAN Gateway) (2022-24)

NOTE:  If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS) or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .