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.
2007 Ford Explorer 4.6 8, RWDFACTORY OEM SERVICE PROCEDURE
Module Communications Network
COMMUNICATION NETWORK DIAGNOSTIC TROUBLE CODES (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| U0073 | Control Module Communication Bus Off | Transmission control module (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. |
| U0100 | Lost Communication With ECM/PCM | 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. |
| U0100 | Lost Communication With ECM/PCM | 4WD control 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. |
| U0101 | Lost Communication With TCM | 4WD control module | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0102 | Lost Communication With Transfer Case Control Module (4x4CM) | TCM | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | Instrument cluster | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | TCM | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | 4WD control module | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0140 | Lost Communication With Body Control Module (GEM) | Audio unit | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0140 | Lost Communication With Body Control Module (GEM) | DVD player | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0140 | Lost Communication With Body Control Module (GEM) | Instrument cluster | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0140 | Lost Communication With Body Control Module (GEM) | Parking aid module | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0154 | Lost Communication With Restraints Occupant Classification System Module (OCS) | Instrument cluster | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | Audio unit | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | Parking aid module | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0155 | Lost Communication With Instrument Panel Cluster (IC) Control Module | Smart junction box | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0159 | Lost Communication With Parking Assist Control Module (PAM) | Audio unit | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0159 | Lost Communication With Parking Assist Control Module (PAM) | Instrument cluster | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0164 | Lost Communication With HVAC Control Module (EATC) | SJB | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0184 | Lost Communication With Radio (ACM) | DVD player | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0184 | Lost Communication With Radio (ACM) | Satellite radio receiver | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0193 | Lost Communication With Digital Audio Control Module (SDARS) | Audio unit | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0193 | Lost Communication With Digital Audio Control Module (SDARS) | DVD player | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | Audio unit | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | Satellite radio receiver | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0208 | Lost Communication With Seat Control Module | Instrument cluster | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U0244 | Lost Communication With Running Board Control Module (PRB) | Instrument cluster | CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module that fails the network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | ABS module | Go to Symptom Chart for module that failed network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | Audio unit | Go to Symptom Chart for module that failed network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | Driver seat module (DSM) | Go to Symptom Chart for module that failed network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | Instrument cluster | Go to Symptom Chart for module that failed network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | Occupant classification sensor module | Go to Symptom Chart for module that failed network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | Parking aid module | Go to Symptom Chart for module that failed network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | Power running board module | Go to Symptom Chart for module that failed network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | RCM | Go to Symptom Chart for module that failed network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | 4WD | Go to Symptom Chart for module that failed network test. |
| U1901 | CAN Network #2 Communication Bus Fault - Receive Error | ABS | REFER to VEHICLE DYNAMIC SYSTEMS . |
| U2023 | Fault Received From External Node | ABS module | U2023 is set when a module receives invalid network data from another module with a faulted input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2023 | Fault Received From External Node | Instrument cluster | U2023 is set when a module receives invalid network data from another module with a faulted input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2023 | Fault Received From External Node | Parking aid module | U2023 is set when a module receives invalid network data from another module with a faulted input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2023 | Fault Received From External Node | 4WD | U2023 is set when a module receives invalid network data from another module with a faulted input. RETRIEVE and REPAIR all non-network DTCs in the other modules on the network. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2471 | Unexpected PRNDL State | Parking aid module | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2472 | Unexpected Ignition State | Parking aid module | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2473 | Unexpected Vehicle Speed (VSS) | Audio unit | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2473 | Unexpected Vehicle Speed (VSS) | Parking aid module | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2510 | CAN - Invalid data for Vehicle Security. | Instrument cluster | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
| U2511 | CAN - Data Mis-Match (Receive data does not match expected) | Instrument cluster | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES for a list of all DTCs. |
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.