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 Ford Flex SEFACTORY OEM SERVICE PROCEDURE
Accessory Protocol Interface Module (APIM)
ACCESSORY PROTOCOL INTERFACE MODULE (APIM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action |
|---|---|---|
| B1201:1C | Steering Wheel Audio Switch Pack 2: Circuit Voltage Out of Range | GO to PINPOINT TEST M . |
| B1201:63 | Steering Wheel Audio Switch Pack 2: Circuit / Component Protection Time-Out | GO to PINPOINT TEST M . |
| B1252:04 | USB Port: System Internal Failure | GO to PINPOINT TEST Z . |
| B1252:11 | USB Port: Circuit Short to Ground | GO to PINPOINT TEST Z . |
| B1D79:01 | Microphone Input: General Electrical Failure | GO to PINPOINT TEST Q . |
| U0100:00 | Lost Communication With ECM/PCM: No Sub Type Information | GO to PINPOINT TEST AV . |
| U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | GO to PINPOINT TEST AE . |
| U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | GO to PINPOINT TEST AW . |
| U0155:00 | Lost Communication With Instrument Panel Cluster (IPC ) Control Module: No Sub Type Information | GO to PINPOINT TEST AS . |
| U016A:00 | Lost Communication With Global Positioning System Module: No Sub Type Information | GO to PINPOINT TEST AZ . |
| U0184:00 | Lost Communication With Radio: No Sub Type Information | GO to PINPOINT TEST AT . |
| U0196:00 | Lost Communication With Entertainment Control Module-Rear "A": No Sub Type Information | GO to PINPOINT TEST AU . |
| U0255:00 | Lost Communication With Front Display Interface Module: No Sub Type Information | GO to PINPOINT TEST AY . |
| U0256:00 | Lost Communication With Front Controls Interface Module: No Sub Type Information | GO to PINPOINT TEST AX . |
| U0422:00 | Invalid Data Received From Body Control Module: No Sub Type Information | RETRIEVE and FOLLOW other DTCs present in the Accessory Protocol Interface Module (APIM) or Smart Junction Box (SJB). |
| U0423:00 | Invalid Data Received From Instrument Panel Control Module: No Sub Type Information | RETRIEVE and FOLLOW other DTCs present in the APIM or Instrument Cluster (IC). |
| U046B:00 | Invalid Data Received From Global Positioning System Module: No Sub Type Information | RETRIEVE and FOLLOW other DTCs present in the APIM or Global Positioning System Module (GPSM). |
| U0485:00 | Invalid Data Received From Radio: No Sub Type Information | RETRIEVE and FOLLOW other DTCs present in the APIM or Audio Control Module (ACM). |
| U2100:00 | Initial Configuration Not Complete: No Sub Type Information | REFER to MODULE COMMUNICATIONS NETWORK - MODULE CONFIGURATION article. |
| U2101:00 | Control Module Configuration Incompatible: No Sub Type Information | REFER to MODULE COMMUNICATIONS NETWORK - MODULE CONFIGURATION article. |
| U3000:04 | Control Module: System Internal Failure | GO to PINPOINT TEST X . |
| U3000:41 | Control Module: General Checksum Failure | CLEAR the DTCs. REPEAT the self-test. If DTC U3000:41 is still present, INSTALL a new APIM . REFER to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) in this service information. REPEAT the self-test. |
| U3000:42 | Control Module: General Memory Failure | CLEAR the DTCs. REPEAT the self-test. If DTC U3000:42 is still present, INSTALL a new APIM . REFER to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) in this service information. REPEAT the self-test. |
| U3000:88 | Control Module: Bus Off | REFER to MODULE COMMUNICATIONS NETWORK article. |
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | GO to PINPOINT TEST AL . |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | GO to PINPOINT TEST AK . |
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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