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.
2016 Ford Focus STFACTORY OEM SERVICE PROCEDURE
Module Communications Network DTCS: IPC
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| U0074:88 | Control Module Communication Bus B Off: Bus Off | The module could not communicate with the network at a point in time. The fault is not currently present since the module had to communicate with the scan tool to report the DTC. VERIFY integrity of the connectors and wiring. Refer to Wiring Diagrams Cell MODULE COMMUNICATIONS NETWORK for schematic and connector information. If a communication concern is still present, GO to Pinpoint Test AD |
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.