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.
2013 Ford C-Max EnergiFACTORY OEM SERVICE PROCEDURE
Module Communications Network DTCS: BCM
| DTC | Description | Action |
|---|---|---|
| U0004 | High Speed CAN Communication Bus (+) Low: No Sub Type Information | A High Speed Controller Area Network (HS-CAN) fault was present at a point in time. The fault is not currently present since the module is communicating with the scan tool. CLEAR the DTC . REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to SYSTEM WIRING DIAGRAMS Wiring Diagrams Cell 14 for schematic and connector information. |
| U0005 | High Speed CAN Communication Bus (+) High: No Sub Type Information | A High Speed Controller Area Network (HS-CAN) fault is present but the network may still be functional at a degraded level. One or more modules may not communicate and may not be sending or receiving messages. GO to PINPOINT TEST AD |
| U0007 | High Speed CAN Communication Bus (-) Low: No Sub Type Information | A High Speed Controller Area Network (HS-CAN) fault is present but the network may still be functional at a degraded level. One or more modules may not communicate and may not be sending or receiving messages. GO to PINPOINT TEST AD |
| U0008 | High Speed CAN Communication Bus (-) High: No Sub Type Information | A High Speed Controller Area Network (HS-CAN) fault was present at a point in time. The fault is not currently present since the module is communicating with the scan tool. CLEAR the DTC . REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to SYSTEM WIRING DIAGRAMS Wiring Diagrams Cell 14 for schematic and connector information. |
| U0009 | High Speed CAN Communication Bus (-) Shorted to Bus (+): No Sub Type Information | A High Speed Controller Area Network (HS-CAN) fault was present at a point in time. The fault is not currently present since the module is communicating with the scan tool. CLEAR the DTC . REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to SYSTEM WIRING DIAGRAMS Wiring Diagrams Cell 14 for schematic and connector information. |
| U0013 | Medium Speed CAN Communication Bus (+) Low: No Sub Type Information | A Medium Speed Controller Area Network (MS-CAN) fault is either currently present or was present at a point in time. The BCM can report this DTC while a fault is present because the BCM communicates with the scan tool on the High Speed Controller Area Network (HS-CAN). If no Medium Speed Controller Area Network (MS-CAN) modules communicate, GO to PINPOINT TEST AF If all Medium Speed Controller Area Network (MS-CAN) modules currently communicate, CLEAR the DTC . REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to SYSTEM WIRING DIAGRAMS Wiring Diagrams Cell 14 for schematic and connector information. |
| U0014 | Medium Speed CAN Communication Bus (+) High: No Sub Type Information | A Medium Speed Controller Area Network (MS-CAN) fault is present but the network may still be functional at a degraded level. One or more modules may not communicate and may not be sending or receiving messages. GO to PINPOINT TEST AF |
| U0016 | Medium Speed CAN Communication Bus (-) Low: No Sub Type Information | A Medium Speed Controller Area Network (MS-CAN) fault is present but the network may still be functional at a degraded level. One or more modules may not communicate and may not be sending or receiving messages. GO to PINPOINT TEST AF |
| U0017 | Medium Speed CAN Communication Bus(-) High: No Sub Type Information | A Medium Speed Controller Area Network (MS-CAN) fault is either currently present or was present at a point in time. The BCM can report this DTC while a fault is present because the BCM communicates with the scan tool on the High Speed Controller Area Network (HS-CAN). If no Medium Speed Controller Area Network (MS-CAN) modules communicate, GO to PINPOINT TEST AF If all Medium Speed Controller Area Network (MS-CAN) modules currently communicate, CLEAR the DTC . REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information. |
| U0018 | Medium Speed CAN Communication Bus (-) Shorted to Bus (+): No Sub Type Information | A Medium Speed Controller Area Network (MS-CAN) fault was present at a point in time. The fault is not currently present since the module is communicating with the scan tool. CLEAR the DTC . REPEAT the network test with the scan tool. VERIFY the integrity of the connectors and wiring. Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information. |
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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