DTC Charts

WARNING: This page is about a different car, the 2012 Ford Mustang. 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 faulty wiring or low battery voltage occurrences. Additionally, vehicle service procedures such as module reprogramming will 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. Test the vehicle battery, refer to BATTERY, BATTERY MOUNTING & BATTERY CABLES .

NOTE: DTC U1900 will set in a module that is reporting a communication fault from another module on the data bus. The module that reports the fault is not the problem module.

COMMUNICATION NETWORK DTC CHART

DTC	Description	Action
U0028:08	Vehicle Communication Bus A: Bus Signal/Message Failure	The module could not communicate on the network at a point in time. The fault is not currently present (the module had to communicate with the scan tool to report this DTC). CLEAR the DTC. REPEAT the Network Test with the scan tool. VERIFY the integrity of the connectors and wiring Refer to OEM WIRING DIAGRAMS - MODULE COMMUNICATIONS NETWORK for schematic and connector information.
U0028:88	Vehicle Communication Bus A: Bus off	The module could not communicate on the network at a point in time. The fault is not currently present (the module had to communicate with the scan tool to report this DTC). CLEAR the DTC. REPEAT the Network Test with the scan tool. VERIFY the integrity of the connectors and wiring Refer to OEM WIRING DIAGRAMS - MODULE COMMUNICATIONS NETWORK for schematic and connector information.
U0073	Control Module Communication Bus Off	The module could not communicate on the network at a point in time. The fault is not currently present (the module had to communicate with the scan tool to report this DTC). CLEAR the DTC. REPEAT the Network Test with the scan tool. VERIFY the integrity of the connectors and wiring Refer to OEM WIRING DIAGRAMS - MODULE COMMUNICATIONS NETWORK for schematic and connector information.
U2472	Unexpected Ignition State	This DTC is only set when an on-demand self-test is run with the test entry conditions not correct. CLEAR the DTC. REPEAT the self-test with the ignition in the ON position and the vehicle stationary.
U2473	Unexpected Vehicle Speed	This DTC is only set when an on-demand self-test is run with the test entry conditions not correct. CLEAR the DTC. REPEAT the self-test with the ignition in the ON position and the vehicle stationary.
-	All network DTCs referenced to this information	GO to SYMPTOM CHART .
-	All other DTCs	REFER to MULTIFUNCTION ELECTRONIC MODULES .