Information Bus

Communications Network

DTC Charts

NOTE: Network DTCs (U-codes) are often a result of intermittent concerns such as damaged wiring or low battery voltage occurrences. Additionally, vehicle repair procedures such as module reprogramming often set network DTCs. Replacing a module to resolve a network DTC is unlikely to resolve the concern. To prevent repeat network DTC concerns, inspect all network wiring, especially connectors. Check for added vehicle accessories connected to the Controller Area Network (CAN) bus, such as aftermarket throttle or trailer brake controllers, or other modifications that may be causing the U-code DTC. Test the vehicle battery, refer to Battery.

Communication Network DTC Chart

NOTE: Some modules on this vehicle utilize a 5-character DTC followed by a 2-character failure-type code. The failure-type code provides information about specific fault conditions. Continuous memory DTCs have an additional 2-character DTC status code suffix to assist in determining DTC history.






1 Refer to the Note at the beginning of the DTC Chart.