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.
2009 Ford Expedition 4WDFACTORY OEM SERVICE PROCEDURE
Module Communications Network Systems 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. |
| 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. |
| U0073 | Control Module Communication Bus A 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 | 4X4 control module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST A . |
| U0100 | Lost Communication With ECM /PCM | ABS module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST A . |
| U0100 | Lost Communication With ECM /PCM | Instrument Cluster (IC) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST A . |
| U0100 | Lost Communication With ECM /PCM | TCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST A . |
| U0100 | Lost Communication With ECM /PCM | VDM | 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 | Accessory Protocol Interface Module (APIM) | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0101 | Lost Communication With TCM | 4X4 control module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST G . |
| 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 | Lost Communication With TCM | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST G . |
| U0102 | Lost Communication With Transfer Case Control Module (4x4CM) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST E . |
| U0102 | Lost Communication With Transfer Case Control Module (4x4CM) | TCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST E . |
| 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 E . |
| U0121 | Lost Communication With 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 | Lost Communication With ABS Control Module | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST B . |
| U0121 | Lost Communication With ABS Control Module | TCM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST B . |
| U0122 | Lost Communication With Vehicle Dynamics Control Module | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST F . |
| U0140 | Lost Communication With Body Control Module (GEM ) | ABS module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST H . |
| U0140 | Lost Communication With Body Control Module (GEM ) | Audio Control Module (ACM) | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0140 | Lost Communication With Body Control Module (GEM ) | Audio Rear Control Unit (RCU) | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0140 | Lost Communication With Body Control Module (GEM ) | Driver Seat Module (DSM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST H . |
| U0140 | Lost Communication With Body Control Module (GEM ) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST H . |
| U0140 | Lost Communication With Body Control Module (GEM ) | Liftgate/Trunk Module (LTM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST H . |
| U0140 | Lost Communication With Body Control Module (GEM ) | Parking Aid Module (PAM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST H . |
| U0140 | Lost Communication With Body Control Module (GEM ) | Rear Entertainment Module (RETM) | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0140 | Lost Communication With Body Control Module (GEM ) | VDM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST H . |
| U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0140:00 | Lost Communication With Body Control Module (GEM ): No Sub Type Information | Audio Control Module (ACM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST H . |
| U0140:00 | Lost Communication With Body Control Module (GEM ): No Sub Type Information | Audio Digital Signal Processing (DSP) module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST H . |
| U0151 | Lost Communication With Restraints Control Module | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST D . |
| U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC ) Control Module | ABS module | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST C . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC ) Control Module | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC ) Control Module | DSM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST C . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC ) Control Module | LTM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST C . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC ) Control Module | PAM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST C . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC ) Control Module | Smart Junction Box (SJB) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST C . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC ) Control Module | VDM | 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 (IC ) Control Module: No Sub Type Information | ACM | 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 | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0155:00 | Lost Communication With Instrument Panel Cluster (IC ) Control Module: No Sub Type Information | Audio DSP module | 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 S . |
| U0159 | Lost Communication With Parking Assist Control Module (PAM ) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST S . |
| U0159:00 | Lost Communication With Parking Assist Control Module (PAM ): No Sub Type Information | ACM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST S . |
| U0162:00 | Lost Communication With Navigation Display Module: No Sub Type Information | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0164 | Lost Communication With HVAC Control Module (EATC ) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST I . |
| U0164:00 | Lost Communication With HVAC Control Module (EATC ): No Sub Type Information | ACM | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST I . |
| U0184 | Lost Communication With Radio (ACM ) | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0184 | Lost Communication With Radio (ACM ) | Audio RCU | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0184 | Lost Communication With Radio (ACM ) | RETM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0184 | Lost Communication With Radio (ACM ) | Satellite Digital Audio Receiver System (SDARS) module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0184:00 | Lost Communication With Radio: No Sub Type Information | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0184:00 | Lost Communication With Radio (ACM ): No Sub Type Information | Audio DSP module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0193 | Lost Communication With Digital Audio Control Module (SDARS ) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0193 | Lost Communication With Digital Audio Control Module (SDARS ) | Audio RCU | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0193 | Lost Communication With Digital Audio Control Module (SDARS ) | RETM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0193:00 | Lost Communication With Digital Audio Control Module (SDARS ): No Sub Type Information | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | SDARS module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0196:00 | Lost Communication With Entertainment Control Module - Rear (AUX): No Sub Type Information | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0196:00 | Lost Communication With Entertainment Control Module-Rear "A": No Sub Type Information | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0196:00 | Lost Communication With Entertainment Control Module - Rear (AUX): No Sub Type Information | Audio DSP module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0197:00 | Lost Communication With Telephone Control Module: No Sub Type Information | ACM | This DTC refers to the APIM , not the telephone control module. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0197:00 | Lost Communication With Telephone Control Module: No Sub Type Information | Audio DSP module | This DTC refers to the APIM , not the telephone control module. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0208 | Lost Communication With Seat Control Module | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST P . |
| U0230 | Lost Communication With Rear Gate Module (LTM ) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST J . |
| U0238 | Lost Communication With Digital Audio Control Module "D" (DSP ) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0238:00 | Lost Communication With Digital Audio Control Module "D" (DSP ): No Sub Type Information | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0244 | Lost Communication With Running Board Control Module (PRB ) | IC | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST R . |
| U0249 | Lost Communication With Entertainment Control Module - Rear "B" (RCU ) | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0249 | Lost Communication With Entertainment Control Module - Rear "B" (RCU ) | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0249 | Lost Communication With Entertainment Control Module - Rear "B" (RCU ) | SDARS module | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0249:00 | Lost Communication With Entertainment Control Module - Rear "B" (RCU ): No Sub Type Information | ACM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0249:00 | Lost Communication With Entertainment Control Module - Rear "B": No Sub Type Information | APIM | REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . |
| U0253 | Lost Communication With Accessory Protocol Interface Module | Restraints Control Module (RCM) | CLEAR the DTC. REPEAT the network test with the scan tool. If the DTC returns, Go To PINPOINT TEST T . |
| U0401 | Invalid Data Received from ECM /PCM A | ABS module | RETRIEVE and FOLLOW the DTCs from the PCM. |
| U0402 | Invalid Data Received from TCM | ABS module | RETRIEVE and FOLLOW the DTCs from the TCM . |
| U0415 | Invalid Data Received from ABS Control Module | 4X4 control module | RETRIEVE and FOLLOW the DTCs from the ABS module. |
| U0422:00 | Invalid Data Received From Body Control Module: No Sub Type Information | APIM | RETRIEVE and FOLLOW non-network DTCs from the SJB . |
| U0423:00 | Invalid Data Received From Instrument Panel Cluster (IPC ) Control Module: No Sub Type Information | APIM | RETRIEVE and FOLLOW non-network DTCs from the IPC . |
| U0485:00 | Invalid Data Received From Radio: No Sub Type Information | APIM | RETRIEVE and FOLLOW non-network DTCs from the ACM . |
| U1900 | CAN Communication Bus Fault-Receive Error | 4X4 control module | GO to SYMPTOM CHART for the module that failed the network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | Power Running Board (PRB) module | GO to SYMPTOM CHART for the module that failed the network test. |
| U1900 | CAN Communication Bus Fault-Receive Error | Restraints Control Module (RCM) | GO to SYMPTOM CHART for the module that failed the network test. |
| U1901 | CAN Network #2 Communication Bus Fault - Receive Error | ABS module | REFER to VEHICLE DYNAMIC SYSTEMS . |
| U2011 | Module Transmitted Invalid Data (Non SCP ) | VDM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2013 | Compass Module is not Responding | IC | REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES . |
| U2023 | Fault Received From External Node | 4X4 control module | DTC 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 | IC | DTC 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 | PAM | DTC 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 | DSM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2471 | Unexpected PRNDL State | LTM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2471 | Unexpected PRNDL State | PAM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2472 | Unexpected Ignition State | IC | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2472 | Unexpected Ignition State | LTM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2472 | Unexpected Ignition State | PAM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2472 | Unexpected Ignition State | SJB | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2473 | Unexpected Vehicle Speed (VSS ) | PAM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2473 | Unexpected Vehicle Speed (VSS ) | LTM | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2473 | Unexpected Vehicle Speed (VSS ) | SJB | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U3000:88 | Control Module: Bus Off | APIM | The module could not communicate on the network at a point in time. The fault is currently not present since the module is currently communicating with the scan tool reporting this DTC. CLEAR the DTC. REPEAT the network test with the scan tool. |
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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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