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.
2005 Ford Excursion 5.4 L, RWDFACTORY OEM SERVICE PROCEDURE
Four-Wheel Drive Systems DTCS
4WD CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU is Defective | 4WD Control Module | CLEAR DTCs. REPEAT the self-test. If DTC B1342 is retrieved, INSTALL a new 4WD control module. REFER to FOUR-WHEEL DRIVE (4WD) CONTROL MODULE . CLEAR the DTCs. REPEAT the self-test. |
| C1728 | Transfer Case Unable to Transition Between 2H and 4H | 4WD Control Module | Go to PINPOINT TEST A . |
| C1729 | Transfer Case Unable to Transition Between 4H and 4L | 4WD Control Module | Go to PINPOINT TEST A . |
| P1804 | Transmission 4-Wheel Drive High Indicator Circuit Failure | 4WD Control Module | Go to PINPOINT TEST F . |
| P1806 | Transmission 4-Wheel Drive High Indicator Short | 4WD Control Module | Go to PINPOINT TEST F . |
| P1808 | Transmission 4-Wheel Drive Low Indicator Circuit Failure | 4WD Control Module | Go to PINPOINT TEST G . |
| P1810 | Transmission 4-Wheel Drive Low Indicator Short | 4WD Control Module | Go to PINPOINT TEST G . |
| P1812 | Transmission 4-Wheel Drive Mode Select Circuit Failure | 4WD Control Module | Go to PINPOINT TEST C . |
| P1815 | Transmission 4-Wheel Drive Mode Select Short | 4WD Control Module | Go to PINPOINT TEST C . |
| P1819 | Transmission Neutral Safety Switch Short Circuit to Ground | 4WD Control Module | Go to PINPOINT TEST D . |
| P1820 | Transmission Transfer Case Clockwise Shift Relay | 4WD Control Module | Go to PINPOINT TEST C . |
| P1822 | Transmission Transfer Case Clockwise Shift Relay Coil | 4WD Control Module | Go to PINPOINT TEST C . |
| P1828 | Transmission Transfer Case Counterclockwise Shift | 4WD Control Module | Go to PINPOINT TEST C . |
| P1830 | Transmission Transfer Case Counterclockwise Shift | 4WD Control Module | Go to PINPOINT TEST C . |
| P1832 | Transmission Transfer Case Differential Lock-Up | 4WD Control Module | Go to PINPOINT TEST E . |
| P1834 | Transmission Transfer Case Differential Lock-Up | 4WD Control Module | Go to PINPOINT TEST E . |
| P1865 | Transmission Transfer Case Contact Plate Power | 4WD Control Module | Go to PINPOINT TEST C . |
| P1866 | Transmission Transfer Case System Concern | 4WD Control Module | Go to PINPOINT TEST A . |
| P1867 | Transmission Transfer Case Contact Plate General | 4WD Control Module | Go to PINPOINT TEST C . |
| P1876 | Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Failure | 4WD Control Module | Go to PINPOINT TEST E . |
| P1877 | Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short | 4WD Control Module | Go to PINPOINT TEST E . |
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.