Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSLINCOLN2009TOWN CAR SIGNATURE LIMITED, 4.6 VREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXMODULE COMMUNICATIONS NETWORK DTCS
2009 Lincoln Town Car Signature Limited, 4.6 V
Module Communications Network DTCS
2009 Lincoln Town Car Signature Limited, 4.6 VSECTION Module Communications Network DTCS
COMMUNICATION NETWORK DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| U0002 | High Speed CAN Communication Bus Performance | Instrument cluster (IC) | For the module that failed the network test, go to Symptom Chart. |
| U0073 | Control Module Communication Bus A 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 A 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. |
| U0100 | Lost Communication With ECM/PCM | VDM | The fault is currently not present. CLEAR the DTC. REPEAT the network test with the scan tool. |
| U0140 | Lost Communication With Body Control Module (GEM) | 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. |
| U0184 | Lost Communication With Radio (ACM) | Rear audio and temperature control (RATC) module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS article. |
| U1040 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | HVAC module | RETRIEVE and FOLLOW non-network DTCs in the PCM. |
| 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 | HVAC module | RETRIEVE and FOLLOW non-network DTCs in the PCM. |
| U1112 | SCP (J1850) Invalid or Missing Data for Primary Id $70 [Lighting control module, LCM] | HVAC module | RETRIEVE and FOLLOW non-network DTCs in the LCM. |
| U1135 | SCP (J1850) Invalid or Missing Data for Ignition Switch / Starter | DDM | RETRIEVE and FOLLOW non-network DTCs in the LCM. |
| U1178 | SCP (J1850) Invalid or Missing Data for Climate Control (HVAC) | RATC module | 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 (J1850) Communication Bus Fault | IC | For the module that failed the network test, go to Symptom Chart. |
| U1900 | CAN Communication Bus Fault - Receive Error | ABS module | For the module that failed the network test, go to Symptom Chart. |
| U1900 | 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 | RETRIEVE and FOLLOW non-network DTCs in the DDM. |
| U2013 | Compass Module Is Not Responding | IC | REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES article. |
| 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. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.