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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 998 (LANE KEEPING SYSTEM)
2021 Ford Expedition Platinum, RWD
Section 998 (Lane Keeping System)
2021 Ford Expedition Platinum, RWDSECTION Section 998 (Lane Keeping System)
WARNING: This page is about a different car, the 2021 Lincoln Nautilus. However, it is still accessible from the selected car via links, so may be relevant.
- Description And Operation
- Diagnosis And Testing
- Lane Keeping System
- DTC Chart(s)
- Symptom Chart(s)
- Pinpoint Tests
- Pinpoint Test A: The Lane Keeping System Does Not Turn On Or Activate
- Pinpoint Test B: The Lane Keeping System Does Not Provide Feedback When Activated
- Pinpoint Test C: DTC (Diagnostic Trouble Code) B120C:11, DTC (Diagnostic Trouble Code) B120C:13
- Pinpoint Test D: The Message Center Displays A 'Front Camera Malfunction Service REQUIRED' Message
- Pinpoint Test E: DTC (Diagnostic Trouble Code) U0100:00, DTC (Diagnostic Trouble Code) U0100:87
- Pinpoint Test F: DTC (Diagnostic Trouble Code) U0121:00
- Pinpoint Test G: DTC (Diagnostic Trouble Code) U0131:00, DTC (Diagnostic Trouble Code) U0131:87
- Pinpoint Test H: DTC (Diagnostic Trouble Code) U0140:00, DTC (Diagnostic Trouble Code) U0140:87
- Pinpoint Test I: DTC (Diagnostic Trouble Code) U0151:00, DTC (Diagnostic Trouble Code) U0151:87
- Pinpoint Test J: DTC (Diagnostic Trouble Code) U0155:00, DTC (Diagnostic Trouble Code) U0155:87
- Pinpoint Test K: DTC (Diagnostic Trouble Code) U0158:00
- Pinpoint Test L: DTC (Diagnostic Trouble Code) U0212:00, DTC (Diagnostic Trouble Code) U0212:87
- Pinpoint Test M: DTC (Diagnostic Trouble Code) U0253:00
- Pinpoint Test N: DTC (Diagnostic Trouble Code) U3003:16
- Pinpoint Test O: DTC (Diagnostic Trouble Code) U3003:17
- Pinpoint Test P: U0130:00
- Pinpoint Test Q: The Pre-Collision Assist System Is Inoperative
- Lane Keeping System
- Removal And Installation
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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.