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.
2021 Lincoln Navigator Base, 4WDFACTORY OEM SERVICE PROCEDURE
Automatic Transmission External Controls
- Description And Operation
- Diagnosis And Testing
- External Controls
- Inspection and Verification
- Diagnostic Trouble Code (DTC) Chart
- Symptom Chart
- Pinpoint Tests
- Pinpoint Test A: DTC P0562
- Pinpoint Test B: DTC P0563
- Pinpoint Test C: DTC P07EC, P07ED
- Pinpoint Test D: DTC P0814
- Pinpoint Test E: Automatic Return To Park Function Does Not Operate Correctly
- Pinpoint Test F: Brake Shift Interlock Override Switch Does Not Release Correctly
- Pinpoint Test G: Progressive Range Selection Does Not Operate Correctly
- Pinpoint Test H: Paddle Shifters Are Inoperative Or Do Not Operate Properly
- Pinpoint Test I: Internal Module DTCS
- Pinpoint Test J: DTC U0100, U0401
- Pinpoint Test K: DTC U0102
- Pinpoint Test L: DTC U0121
- Pinpoint Test M: DTC U0140, U0422
- Pinpoint Test N: DTC U0155
- Pinpoint Test O: DTC U0301
- Pinpoint Test P: DTC U1011, U101F
- Pinpoint Test Q: Transmission Stuck In Park Position
- Pinpoint Test R: Transmission Returns To Park Automatically
- Pinpoint Test S: Transmission Stuck In Drive
- Pinpoint Test T: Gear Select Button Slow To Return
- External Controls
- General Procedures
- Removal And Installation
Factory Service Tools
Use the Manual With the Right Hardware
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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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