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.
2018 Ford Fiesta STFACTORY OEM SERVICE PROCEDURE
Perimeter Anti-Theft Alarm
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| B10B1:92 | Cabin Set/Reset Switch: Performance or Incorrect Operation | GO to Pinpoint Test B |
| B112C:87 | Interior Motion Sensor: Missing Message | GO to Pinpoint Test F |
| B112C:96 | Interior Motion Sensor: Component Internal Failure | INSTALL a new intrusion sensor. |
| P254F:00 | Engine Hood Switch Circuit/Open: No Sub Type Information | GO to Pinpoint Test E |
| All other Diagnostic Trouble Codes (DTCs) | - | REFER to: Body Control Module (BCM) . |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.