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.
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HOMESERVICE MANUALSFORD2021EXPEDITION PLATINUM, RWDREPAIR AND DIAGNOSISGENERAL INFORMATIONDTC INDEXDTC INDEX (ACCELERATION CONTROL - EXTERIOR LIGHTING SYSTEM)EXTERIOR LIGHTING SYSTEM DTCSAUTOLAMPS
2021 Ford Expedition Platinum, RWD
Exterior Lighting System DTCS: Autolamps
2021 Ford Expedition Platinum, RWDSECTION Autolamps
| DTC | Description | Action |
|---|---|---|
| B1A85:11 | Ambient Light Sensor: Circuit Short To Ground | GO to Pinpoint Test A |
| B1A85:13 | Ambient Light Sensor: Circuit Open | GO to Pinpoint Test A |
| For other BCM Diagnostic Trouble Codes (DTCs) | - | Refer to: Body Control Module (BCM) . |
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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.