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.
2012 Lincoln MKS Base, FWDFACTORY OEM SERVICE PROCEDURE
Module Communications Network DTCS
COMMUNICATION NETWORK DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action |
|---|---|---|
| U0001:88 | High Speed CAN Communication Bus: Bus Off | 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. |
| U0002:88 | High Speed CAN Communication Bus Performance: Bus Off | 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. |
| U0011:88 | Medium Speed CAN Communication Bus Performance: Bus Off | 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. |
| U0028:08 | Vehicle Communication Bus A: Bus Signal/Message Failures | 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. |
| U0028:88 | Vehicle Communication Bus A: Bus Off | 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 | 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. |
| U0074 | Control Module Communication Bus B Off | REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL . |
| U0100 | Lost Communication With ECM/PCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST A . |
| U0100:00 | Lost Communication With ECM/PCM "A": No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST A . |
| U0100:87 | Lost Communication With ECM/PCM "A": Missing Message | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST A . |
| U0102 | Lost Communication With Transfer Case Control Module (4X4CM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST H . |
| U0102:00 | Lost Communication With Transfer Case Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST H . |
| U0104 | Lost Communication With Cruise Control Module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST I . |
| U0104:00 | Lost Communication With Cruise Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST I . |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST B . |
| U0121:00 | Lost Communication With Anti-Lock Brake System (ABS) Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST B . |
| U0126:00 | Lost Communication With Steering Angle Sensor Module (SASM): No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST L . |
| U0131 | Lost Communication With Power Steering Control Module (PSCM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST D . |
| U0131:00 | Lost Communication With Power Steering Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST D . |
| U0140 | Lost Communication With Body Control Module (GEM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST U . |
| U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST U . |
| U0140:87 | Lost Communication With Body Control Module): Missing Message | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST U . |
| U0151 | Lost Communication With Restraints Control Module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST E . |
| U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST E . |
| U0154:00 | Lost Communication With Restraints Occupant Classification System Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST F . |
| U0155 | Lost Communication With Instrument Panel Cluster (IPC) Module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST C . |
| U0155:00 | Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST C . |
| U0155:87 | Lost Communication With Instrument Panel Cluster (IPC) Control Module: Missing Message | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST C . |
| U0158:00 | Lost Communication With Head Up Display: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST G . |
| U0159 | Lost Communication With Parking Assist Control Module (PAM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST J . |
| U0159:00 | Lost Communication With Parking Assist Control Module "A": No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST J . |
| U0161:00 | Lost Communication With Compass Module: No Sub Type Information | REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES . |
| U0162:00 | Lost Communication With Navigation Display Module: No Sub Type Information | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0163:00 | Lost Communication With Navigation Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST N . |
| U0164 | Lost Communication With HVAC Control Module (EATC) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST V . |
| U0164:00 | Lost Communication With HVAC Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST V . |
| U016A:00 | Lost Communication With Global Positioning System Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST P . |
| U0184 | Lost Communication With Radio (ACM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST M . |
| U0184:00 | Lost Communication With Radio: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST M . |
| U0197 | Lost Communication With Telephone Control Module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST Z . |
| U0197:00 | Lost Communication With Telephone Control Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST Z . |
| U0208:00 | Lost Communication With "Seat Control Module A": No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST T . |
| U0214:00 | Lost Communication With Remote Function Actuator: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST Y . |
| U0238 | Lost Communication With Digital Audio Control Module "D" (DSP) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST W . |
| U0238:00 | Lost Communication With Digital Audio Control Module "D": No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST W . |
| U0241:00 | Lost Communication With Headlamp Control Module (HCM): No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST K . |
| U0242:00 | Lost Communication With Headlamp Control Module "B": No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST R . |
| U0253:00 | Lost Communication With Accessory Protocol Interface Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST Z . |
| U0255 | Lost Communication With Front Controls Interface Module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST N . |
| U0255:00 | Lost Communication With Front Display Interface Module: No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST O . |
| U0256:00 | Lost Communication With Front Controls Interface Module "A": No Sub Type Information | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST N . |
| U0401 | Invalid Data Received from ECM/PCM A | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0401:00 | Invalid Data Received from ECM/PCM A: No Sub Type Information | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0401:68 | Invalid Data Received from ECM/PCM A: Event Information | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0405 | Invalid Data Received from Cruise Control Module | RETRIEVE and FOLLOW the DTCs from the C-CM. |
| U0405:55 | Invalid Data Received from Cruise Control Module: Not Configured | RETRIEVE and FOLLOW the DTCs from the C-CM. |
| U0405:68 | Invalid Data Received from Cruise Control Module: Event Information | RETRIEVE and FOLLOW the DTCs from the C-CM. |
| U0415 | Invalid Data Received From Anti-Lock Brake System (ABS) Control Module | RETRIEVE and FOLLOW the DTCs from the ABS module. |
| U0415:00 | Invalid Data Received From Anti-Lock Brake System (ABS) Control Module: No Sub Type Information | RETRIEVE and FOLLOW the DTCs from the ABS module. |
| U0418:68 | Invalid Data Received from Brake System Control Module: Event Information | RETRIEVE and FOLLOW the DTCs from the ABS module. |
| U0420 | Invalid Data Received From Power Steering Control Module | RETRIEVE and FOLLOW the DTCs from the PSCM. |
| U0422:00 | Invalid Data Received From Body Control Module: No Sub Type Information | RETRIEVE and FOLLOW the DTCs from the SJB. |
| U0422:55 | Invalid Data Received From Body Control Module: Not Configured | RETRIEVE and FOLLOW the DTCs from the SJB. |
| U0422:68 | Invalid Data Received From Body Control Module: Event Information | RETRIEVE and FOLLOW the DTCs from the SJB. |
| U0423:00 | Invalid Data Received From Instrument Panel Cluster Control Module: No Sub Type Information | RETRIEVE and FOLLOW the DTCs from the IPC and other modules. |
| U0423:68 | Invalid Data Received From Instrument Panel Cluster Control Module: Event Information | RETRIEVE and FOLLOW the DTCs from the IPC and other modules. |
| U0424:68 | Invalid Data Received From HVAC Control Module: Event Information | RETRIEVE and FOLLOW the DTCs from the HVAC module. |
| U0428:00 | Invalid Data Received From Steering Angle Sensor Module (SASM): No Sub Type Information | RETRIEVE and FOLLOW the DTCs from the SASM. |
| U0428:68 | Invalid Data Received From Steering Angle Sensor Module (SASM): Event Information | RETRIEVE and FOLLOW the DTCs from the SASM. |
| U0430:68 | Invalid Data Received From Tire Pressure Monitor Module: Event Information | RETRIEVE and FOLLOW the DTCs from the SJB. |
| U0452 | Invalid Data Received from Restraints Control Module | RETRIEVE and FOLLOW the DTCs from the RCM. |
| U0459:68 | Invalid Data Received from Head Up Display: Event Information | RETRIEVE and FOLLOW the DTCs from the HUD module. |
| U045A:00 | Invalid Data Received From Parking Assist Control Module "A": No Sub Type Information | RETRIEVE and FOLLOW the DTCs from the PAM. |
| U045A:55 | Invalid Data Received From Parking Assist Control Module "A": Not Configured | RETRIEVE and FOLLOW the DTCs from the PAM. |
| U045A:68 | Invalid Data Received From Parking Assist Control Module "A": Event Information | RETRIEVE and FOLLOW the DTCs from the PAM. |
| U0462:68 | Invalid Data Received From Compass Module: Event Information | REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES . |
| U0464:68 | Invalid Data Received From Navigation Control Module: Event Information | RETRIEVE and FOLLOW the DTCs from the ACM. |
| U046B:00 | Invalid Data Received From Global Positioning System Module: No Sub Type Information | RETRIEVE and FOLLOW the DTCs from the GPSM. |
| U0485:00 | Invalid Data Received From Radio: No Sub Type Information | RETRIEVE and FOLLOW the DTCs from the ACM. |
| U049A:68 | Invalid Data Received from "Door Control Module A": Event Information | RETRIEVE and FOLLOW the DTCs from the DDM. |
| U0554:00 | Invalid Data Received from Accessory Protocol Interface Module: No Sub Type Information | RETRIEVE and FOLLOW the DTCs from the APIM. |
| U0557:68 | Invalid Data Received From Front Controls Interface Module "A": Event Information | RETRIEVE and FOLLOW the DTCs from the FCIM. |
| U2023 | Fault Received From External Node | The module had an invalid network input/message from another module. RETRIEVE and FOLLOW the non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U3000:88 | Control Module: Bus Off | 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. |
Factory Service Tools
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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.
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