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.
2011 Mercury Milan Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Module Communications Network DTCS
COMMUNICATION NETWORK DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Action |
|---|---|---|---|
| U0001 | High Speed CAN Communication Bus | 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. |
| U0001:88 | High Speed CAN Communication Bus: Bus Off | ABS module DC/DC HCM PSCM | 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 | IPC | 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 | IPC | 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 | RCM | 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 | OCSM RCM | 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 | TCM | 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. |
| U0074:00 | Control Module Communication Bus B Off: No Sub Type Information | BECM | Refer to VIN - IDENTIFICATION CODES article. |
| U0100 | Lost Communication With ECM/PCM | 4X4 control module ABS module TCM | 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 | ABS module ACCM APIM BECM DC/DC IPC PSCM RCM | 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 | HCM OCSM TCM (Hybrid) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST A . |
| U0101 | Lost Communication With TCM | ABS module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST G . |
| U0101:00 | Lost Communication With TCM: No Sub Type Information | BECM DC/DC IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST G . |
| U0101:87 | Lost Communication With TCM: Missing Message | HCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST G . |
| U0102:00 | Lost Communication With Transfer Case Control Module: No Sub Type Information | IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST H . |
| U010F:00 | Lost Communication With Air Conditioning Control Module: No Sub Type Information | IPC (Hybrid) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST K . |
| U0111:00 | Lost Communication With Battery Energy Control Module "A": No Sub Type Information | IPC (Hybrid) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST J . |
| U0111:87 | Lost Communication With Battery Energy Control Module "A": Missing Message | TCM (Hybrid) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST J . |
| U0114 | Lost Communication With Four-Wheel Drive Clutch Control Module | ABS module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST H . |
| U0114:00 | Lost Communication With Four-Wheel Drive Clutch Control Module: No Sub Type Information | ABS module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST H . |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | 4X4 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 | IPC PSCM RCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST B . |
| U0121:87 | Lost Communication With Anti-Lock Brake System (ABS) Control Module: Missing Message | HCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST B . |
| U0126:87 | Lost Communication With Steering Angle Sensor Module: Missing Message | HCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST D . |
| U0129:87 | Lost Communication With Brake System Control Module: Missing Message | TCM (Hybrid) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST B . |
| U0131:00 | Lost Communication With Power Steering Control Module: No Sub Type Information | IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST D . |
| U0131:87 | Lost Communication With Power Steering Control Module: Missing Message | ABS module | 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) | ABS module ACM DDM DSM FCIM FDIM PAM ILCM | 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 (GEM): No Sub Type Information | ACM APIM Audio DSP module FCIM GPSM HVAC module IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST U . |
| U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | APIM BECM IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST E . |
| U0151:87 | Lost Communication With Restraints Control Module: Missing Message | ABS module OCSM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST E . |
| U0151:88 | Lost Communication With Restraints Control Module: 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. |
| U0154:00 | Lost Communication With Restraints Occupant Classification System Module: No Sub Type Information | RCM | 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 | 4X4 control module ABS module ACM DSM FDIM GPSM PAM SJB | 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 | ACCM ACM APIM Audio DSP module BECM DC/DC HVAC module RCM | 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 | ABS module HCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST C . |
| U0159 | Lost Communication With Parking Assist Control Module (PAM) | ACM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST T . |
| U0159:00 | Lost Communication With Parking Assist Control Module (PAM): No Sub Type Information | ACM IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST T . |
| U0161:00 | Lost Communication With Compass Module: No Sub Type Information | IPC | REFER to INSTRUMENTATION, MESSAGE CENTER & WARNING CHIMES -- FUSION, MILAN & MKZ article. |
| U0162:00 | Lost Communication With Navigation Display Module: No Sub Type Information | ACM | REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article. |
| U0163:00 | Lost Communication With Navigation Control Module: No Sub Type Information | IPC | 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 | FCIM FDIM | 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 | ACM IPC | 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 | APIM | 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) | FCIM FDIM | 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 | APIM Audio DSP module FCIM IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST M . |
| U0193 | Lost Communication With Digital Audio Control Module (SDARS) | ACM FDIM | REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article. |
| U0193:00 | Lost Communication With Digital Audio Control Module (SDARS): No Sub Type Information | ACM | REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article. |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | ACM FDIM | REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article. |
| U0196:00 | Lost Communication With Entertainment Control Module - Rear "A": No Sub Type Information | ACM Audio DSP module | REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article. |
| U0197 | Lost Communication With Telephone Control Module | ACM FDIM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST AA . |
| U0197:00 | Lost Communication With Telephone Control Module: No Sub Type Information | ACM Audio DSP module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST AA . |
| U0208:00 | Lost Communication With Seat Control Module "A": No Sub Type Information | IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST Z . |
| U0232:00 | Lost Communication With Side Obstacle Detection Control Module - Left: No Sub Type Information | IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST R . |
| U0233:00 | Lost Communication With Side Obstacle Detection Control Module - Right: No Sub Type Information | IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST S . |
| U0238 | Lost Communication With Digital Audio Control Module "D" (DSP) | ACM FDIM | 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" (DSP): No Sub Type Information | ACM | 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 "A": No Sub Type Information | IPC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST I . |
| U0249 | Lost Communication With Entertainment Control Module - Rear "B" (RCU) | ACM FDIM | REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article. |
| U0249:00 | Lost Communication With Entertainment Control Module - Rear "B" (RCU): No Sub Type Information | ACM | REFER to INFORMATION & ENTERTAINMENT SYSTEMS -- FUSION, MILAN & MKZ article. |
| U0253:00 | Lost Communication With Accessory Protocol Interface Module: No Sub Type Information | RCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST AA . |
| U0255 | Lost Communication With Front Controls Interface Module | ACM | 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 | ACM APIM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST O . |
| U0256 | Lost Communication With Front Display Interface Module | ACM | 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: No Sub Type Information | ACM APIM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST N . |
| U0294:87 | Lost Communication With Powertrain Control Monitor Module: Missing Message | TCM (Hybrid) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST A . |
| U0298:00 | Lost Communication With DC to DC Converter Control Module "A": No Sub Type Information | BECM IPC (Hybrid) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, GO to PINPOINT TEST L . |
| U029A:00 | Lost Communication With Hybrid Battery Pack Sensor Module: No Sub Type Information | BECM | REFER to HIGH VOLTAGE TRACTION BATTERY -- FUSION HYBRID, MILAN HYBRID & MKZ HYBRID article. |
| U0401 | Invalid Data Received from ECM/PCM A | 4X4 control module ABS module | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0401:00 | Invalid Data Received from ECM/PCM "A": No Sub Type Information | ABS module PSCM RCM | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0401:66 | Invalid Data Received from ECM/PCM "A": Signal Has Too Many Transitions / Events | BECM | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0401:68 | Invalid Data Received from ECM/PCM "A": Event Information | ACCM BECM DC/DC IPC | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0401:86 | Invalid Data Received from ECM/PCM "A": Signal Invalid | HCM | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0402 | Invalid Data Received from TCM | ABS module | RETRIEVE and FOLLOW the DTCs from the TCM. |
| U0402:68 | Invalid Data Received from TCM: Event Information | BECM IPC | RETRIEVE and FOLLOW the DTCs from the TCM. |
| U0402:86 | Invalid Data Received from TCM: Signal Invalid | HCM | RETRIEVE and FOLLOW the DTCs from the TCM. |
| U040A:68 | Invalid Data Received from Air Conditioning Control Module: Event Information | IPC | RETRIEVE and FOLLOW the DTCs from the ACCM. |
| U0412:68 | Invalid Data Received from Battery Energy Control Module A: Event Information | IPC (Hybrid) | RETRIEVE and FOLLOW the DTCs from the BECM. |
| U0412:81 | Invalid Data Received from Battery Energy Control Module A: Invalid Serial Data Received | TCM (Hybrid) | RETRIEVE and FOLLOW the DTCs from the BECM. |
| U0414 | Invalid Data Received From Four-Wheel Drive Clutch Control Module | ABS module | RETRIEVE and FOLLOW the DTCs from the 4X4 control module. |
| U0415 | Invalid Data Received From Anti-Lock Brake System (ABS) Control Module | 4X4 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 | PSCM | RETRIEVE and FOLLOW the DTCs from the ABS module. |
| U0415:68 | Invalid Data Received from Anti-Lock Brake System (ABS) Control Module: Event Information | IPC | RETRIEVE and FOLLOW the DTCs from the ABS module. |
| U0415:86 | Invalid Data Received from Anti-Lock Brake System (ABS) Control Module: Signal Invalid | HCM | RETRIEVE and FOLLOW the DTCs from the ABS module. |
| U0420:87 | Invalid Data Received From Power Steering Control Module: Missing Message | ABS module | RETRIEVE and FOLLOW the DTCs from the PSCM. |
| U0422:00 | Invalid Data Received From Body Control Module: No Sub Type Information | GPSM | RETRIEVE and FOLLOW the DTCs from the SJB. |
| U0422:68 | Invalid Data Received From Body Control Module: Event Information | HVAC module IPC | RETRIEVE and FOLLOW the DTCs from the SJB. |
| U0423:00 | Invalid Data Received From Instrument Panel Cluster (IPC) Control Module: No Sub Type Information | APIM GPSM | RETRIEVE and FOLLOW the DTCs from the IPC. |
| U0423:64 | Invalid Data Received From Instrument Panel Cluster (IPC) Control Module: Signal Plausibility Failure | ABS module | RETRIEVE and FOLLOW the DTCs from the IPC. |
| U0423:68 | Invalid Data Received From Instrument Panel Cluster (IPC) Control Module: Event Information | ACCM HVAC module | RETRIEVE and FOLLOW the DTCs from the IPC. |
| U0423:86 | Invalid Data Received From Instrument Panel Cluster (IPC) Control Module: Signal Invalid | HCM | RETRIEVE and FOLLOW the DTCs from the IPC. |
| U0424:68 | Invalid Data Received From HVAC Control Module: Event Information | BECM | RETRIEVE and FOLLOW the DTCs from the HVAC module. |
| U0428:86 | Invalid Data Received From Steering Angle Sensor Module: Signal Invalid | HCM | RETRIEVE and FOLLOW the DTCs from the PSCM. |
| U0430:68 | Invalid Data Received From Tire Pressure Monitor Module: Event Information | HVAC module | RETRIEVE and FOLLOW the DTCs from the SJB. |
| U0442:86 | Invalid Data Received From ECM/PCM "B": Signal Invalid | OCSM | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0452:00 | Invalid Data Received from Restraints Control Module A: No Sub Type Information | BECM | RETRIEVE and FOLLOW the DTCs from the RCM. |
| U0452:29 | Invalid Data Received from Restraints Control Module A: Signal Invalid | ABS module | RETRIEVE and FOLLOW the DTCs from the RCM. |
| U0452:68 | Invalid Data Received from Restraints Control Module A: Event Information | IPC | RETRIEVE and FOLLOW the DTCs from the RCM. |
| U0452:86 | Invalid Data Received From Restraints Control Module A: Signal Invalid | OCSM | RETRIEVE and FOLLOW the DTCs from the RCM. |
| U0462:00 | Invalid Data Received From Compass Module: No Sub Type Information | IPC | REFER to INSTRUMENTATION, MESSAGE CENTER & WARNING CHIMES -- FUSION, MILAN & MKZ article. |
| U0462:68 | Invalid Data Received From Compass Module: Event Information | IPC | REFER to INSTRUMENTATION, MESSAGE CENTER & WARNING CHIMES -- FUSION, MILAN & MKZ article. |
| U046B:00 | Invalid Data Received From Global Positioning System Module: No Sub Type Information | APIM | RETRIEVE and FOLLOW the DTCs from the GPSM. |
| U0485:00 | Invalid Data Received From Radio: No Sub Type Information | APIM | RETRIEVE and FOLLOW the DTCs from the ACM. |
| U0533:68 | Invalid Data Received from Side Obstacle Detection Control Module - Left: Event Information | IPC | RETRIEVE and FOLLOW the DTCs from the SOD-L. |
| U0534:68 | Invalid Data Received from Side Obstacle Detection Control Module - Right: Event Information | IPC | RETRIEVE and FOLLOW the DTCs from the SOD-R. |
| U0599:68 | Invalid Data Received from DC to DC Converter Control Module "A": Event Information | BECM IPC (Hybrid) | RETRIEVE and FOLLOW the DTCs from the DC/DC. |
| U1900 | CAN Communication Bus Fault-Receive Error | ABS module | GO to SYMPTOM TABLE for module that failed network test. |
| U2023 | Fault Received From External Node | ABS module | 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 -- FUSION, MILAN & MKZ article. |
| U2472 | Unexpected Ignition State | SJB | REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. |
| U2473 | Unexpected Vehicle Speed | SJB | REFER to MULTIFUNCTION ELECTRONIC MODULES -- FUSION, MILAN & MKZ article. |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.