2000 Lincoln Navigator 4WDFACTORY OEM SERVICE PROCEDURE

Transfer Case DTCS

TRANSFER CASE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC Description Perform Test
B1342 ECU Defective Clear DTCs and retest system. If DTC B1342 is still present, replace GEM.
B1483 Brake Pedal Input Circuit Failure C
B1485 Brake Pedal Input Circuit Short C
B2105 Throttle Position Input Out Of Range Low B
B2106 Throttle Position Input Out Of Range High B
C1107 ABS Function Enabled Input Circuit Failure A
P0500 VSS Malfunction C
P1812 4WD Mode Select Circuit Failure A
P1815 4WD Mode Select Switch Short To Ground C
P1820 T/C LO-To-HI Shift Relay Open/Short To Ground B
P1822 T/C LO-To-HI Shift Relay Coil Short To Power B
P1824 4WD Clutch Relay Circuit Failure A
P1826 4WD Clutch Relay Short To Power A
P1828 T/C HI-To-LO Shift Relay Coil Circuit B
P1830 T/C HI-To-LO Shift Relay Coil Short To Power B
P1836 Front Drive Shaft Speed Sensor Circuit A
P1837 Rear Drive Shaft Speed Sensor Circuit A
P1838 T/C Shift Motor Circuit Failure B
P1846 T/C Contact Plate "A" Open Circuit Failure B
P1850 T/C Contact Plate "B" Open Circuit Failure B
P1854 T/C Contact Plate "C" Open Circuit Failure B
P1858 T/C Contact Plate "D" Open Circuit Failure B
P1866 T/C System Concern B
P1867 T/C Contact Plate General Circuit Failure B
P1874 Hall Effect Sensor Power Circuit Failure A
P1875 Hall Effect Sensor Power Circuit Short B
P1891 T/C Contact Plate Ground Return Open Circuit B
B1892 A4WD 4X4 Mechanical Lock Output Circuit Failure B
B1893 A4WD 4X4 Mechanical Lock Output Circuit Short To Power B
Factory Service Tools

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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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