DTC Charts

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

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, MOUNTING AND CABLES .

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.

COMMUNICATION NETWORK DTC CHART

DTC	Description	Source	Action
U0001:88	High Speed CAN Communication Bus: Bus off	ABS module	The module could not communicate on the network at a point in time. The fault is currently not present since the module is currently communicating with the scan tool reporting this DTC. CLEAR the DTC. REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to MODULE COMMUNICATIONS NETWORK for additional information.
U0028:08	Vehicle Communication Bus A: Bus Signal/Message Failures	Restraints Control Module (RCM)	The module could not communicate on the network at a point in time. The fault is currently not present since the module is currently communicating with the scan tool reporting this DTC. CLEAR the DTC. REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to MODULE COMMUNICATIONS NETWORK for additional information.
U0028:88	Vehicle Communication Bus A: Bus Off	Restraints Control Module (RCM)	The module could not communicate on the network at a point in time. The fault is currently not present since the module is currently communicating with the scan tool reporting this DTC. CLEAR the DTC. REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to MODULE COMMUNICATIONS NETWORK for additional information.
U3000:88	Control Module: Bus Off	Accessory Protocol Interface Module (APIM)	The module could not communicate on the network at a point in time. The fault is currently not present since the module is currently communicating with the scan tool reporting this DTC. CLEAR the DTC. REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to MODULE COMMUNICATIONS NETWORK for additional information.