DTC Index
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. 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, MOUNTING & CABLES
article.
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 DIAGNOSTIC TROUBLE CODE INDEX
| DTC | Description | Source | Action |
|---|---|---|---|
| U0073 | Control Module Communication Bus Off | Vehicle dynamics module (VDM) | The module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0073 | Control Module Communication Bus Off | ABS module | The module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0073 | Control Module Communication Bus Off | VDM | The module could not communicate on the network at a point in time. The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0100 | Lost Communication With PCM | VDM | The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0100 | Lost Communication With PCM | VDM | The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | VDM | For the module that failed the network test, go to Symptom Chart . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | VDM | For the module that failed the network test, go to Symptom Chart . |
| U1041 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | Driver door module (DDM) | RETRIEVE and FOLLOW non-network DTCs in the PCM. |
| U1041 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | Lighting control module (LCM) | RETRIEVE and FOLLOW non-network DTCs in the PCM. |
| U1059 | SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL | DDM | RETRIEVE and FOLLOW non-network DTCs in the PCM. |
| U1059 | SCP (J1850) Invalid or Missing Data for Transmission / Transaxle / PRNDL | LCM | RETRIEVE and FOLLOW non-network DTCs in the PCM. |
| U1073 | SCP (J1850) Invalid or Missing Data for Engine Coolant | Heating ventilation air conditioning (HVAC) module | RETRIEVE and FOLLOW non-network DTCs in the PCM. |
| U1135 | SCP (J1850) Invalid or Missing Data for Ignition Switch / Starter | DDM | RETRIEVE and FOLLOW non-network DTCs in the LCM. |
| U1197 | SCP (J1850) Invalid or Missing Data for Door Locks | LCM | RETRIEVE and FOLLOW non-network DTCs in the DDM. |
| U1199 | SCP (J1850) Invalid or Missing Data for External Access (Doors) | LCM | RETRIEVE and FOLLOW non-network DTCs in the DDM. |
| U1262 | SCP Communication Bus Fault | Instrument cluster (IC) | For the module that failed the network test, go to Symptom Chart . |
| U1262 | SCP Communication Bus Fault | Overhead console message center (MC) | For module that failed network test, go to Symptom Chart . |
| U1900 | HS-CAN Communication Bus Fault - Receive Error | ABS module | For the module that failed the network test, go to Symptom Chart . |
| U1900 | HS-CAN Communication Bus Fault - Receive Error | Fire suppression system module (FSSM) | For the module that failed the network test, go to Symptom Chart . |
| U1900 | HS-CAN Communication Bus Fault - Receive Error | IC | For the module that failed the network test, go to Symptom Chart . |
| U2011 | Module Transmitted Invalid Data (Non SCP) | VDM | Invalid air suspension operating state data was transmitted. RETRIEVE and FOLLOW non-network DTCs in the DDM. |
| U2023 | Fault Received From External Node | ABS module | RETRIEVE and FOLLOW non-network DTCs from other modules. |
| U2023 | Fault Received From External Node | IC | RETRIEVE and FOLLOW non-network DTCs from other modules. |