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 MANUALSLINCOLN2009NAVIGATOR 4WDREPAIR AND DIAGNOSISENGINE MECHANICALSTARTERSTARTING SYSTEMDIAGNOSIS AND TESTINGSTARTING SYSTEMDTC CHARTS
2009 Lincoln Navigator 4WD
DTC Charts
2009 Lincoln Navigator 4WDSECTION DTC Charts
DTC CHARTS
| DTC | Description | Source | Action |
|---|---|---|---|
| P0512 | Starter Request Circuit - Circuit has Power With the Ignition in the OFF Position | PCM | CARRY OUT the Ignition Switch Component Test. Refer to COMPONENT TESTING article for component testing. If necessary, REPLACE the ignition switch. If the ignition switch passed the component test, REPAIR circuit CDC35 (BU/WH) for a short to power. |
| P0705 | Transmission Range (TR) Sensor Circuit Error | Transmission | Refer to the AUTOMATIC TRANSAXLE/TRANSMISSION - 6R80 article for the procedure. |
| P1260 | Theft Detected, Vehicle Immobilized | PCM | REFER to the DTC CHART in ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) article. |
| P1707 | Park/Neutral Position (PNP) Switch Circuit Failure | Transmission | Refer to the AUTOMATIC TRANSAXLE/TRANSMISSION - 6R80 article for the procedure. |
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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.