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 MANUALSLINCOLN2008NAVIGATOR RWDREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXFOUR WHEEL DRIVE SYSTEMS DTCS
2008 Lincoln Navigator RWD
Four Wheel Drive Systems DTCS
2008 Lincoln Navigator RWDSECTION Four Wheel Drive Systems DTCS
4X4 CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1317 | Battery Voltage High | 4X4 Control Module | Go to Pinpoint Test M . |
| B1318 | Battery Voltage Low | 4X4 Control Module | Go to Pinpoint Test M . |
| B1555 | Ignition Run/Start Circuit Failure | 4X4 Control Module | Go to Pinpoint Test L . |
| C1729 | Transfer Case Unable to Transition Between 4H and 4L | 4X4 Control Module | Go to Pinpoint Test P . |
| C1979 | IWE Solenoid Circuit Failure | 4X4 Control Module | Go to Pinpoint Test N . |
| C1980 | IWE Solenoid Short to Battery | 4X4 Control Module | Go to Pinpoint Test N . |
| P1812 | 4-Wheel Drive Mode Select Circuit Failure | 4X4 Control Module | Go to Pinpoint Test P . |
| P1815 | 4-Wheel Drive Mode Select Short Circuit to Ground | 4X4 Control Module | Go to Pinpoint Test P . |
| P1824 | 4-Wheel Drive Clutch Relay Circuit Failure | 4X4 Control Module | Go to Pinpoint Test Q . |
| P1825 | 4-Wheel Drive Clutch Relay Open Circuit | 4X4 Control Module | Go to Pinpoint Test Q . |
| P1826 | 4-Wheel Drive Low Clutch Relay Circuit to Battery | 4X4 Control Module | Go to Pinpoint Test Q . |
| P1827 | 4-Wheel Drive Low Clutch Relay Circuit to Ground | 4X4 Control Module | Go to Pinpoint Test Q . |
| P1849 | Transfer Case Contact Plate 'A' Short Circuit to Ground | 4X4 Control Module | Go to Pinpoint Test P . |
| P1853 | Transfer Case Contact Plate 'B' Short Circuit to Ground | 4X4 Control Module | Go to Pinpoint Test P . |
| P1857 | Transfer Case Contact Plate 'C' Short Circuit to Ground | 4X4 Control Module | Go to Pinpoint Test P . |
| P1861 | Transfer Case Contact Plate 'D' Short Circuit to Ground | 4X4 Control Module | Go to Pinpoint Test P . |
| P1867 | Transfer Case Contact Plate General Circuit Failure | 4X4 Control Module | Go to Pinpoint Test P . |
| P1891 | Transfer Case Contact Plate Ground Return Open Circuit | 4X4 Control Module | Go to Pinpoint Test P . |
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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.