The P0838 trouble code indicates a low voltage condition in the Four Wheel Drive (4WD) switch circuit. Here’s what you should know:
P0838 Four Wheel Drive (4WD) Switch Circuit Low
Code symptoms P0838.
1. Difficulty engaging or disengaging the 4WD system.
2. Inoperable 4WD system.
3. Malfunction indicator lamp (MIL) or Check Engine Light (CEL) may illuminate on the dashboard.
Causes of the code P0838.
1. Faulty 4WD switch.
2. Damaged or corroded wiring or connectors in the 4WD switch circuit.
3. Issues with the 4WD control module.
4. Faulty transfer case motor or actuator.
5. Electrical problems in the 4WD system.
Code Solutions P0838.
1. Replace the 4WD switch if it is found to be faulty.
2. Repair or replace any damaged wiring or connectors in the 4WD switch circuit.
3. Address any issues with the 4WD control module.
4. Replace the transfer case motor or actuator if necessary.
5. Ensure proper electrical connections and system integrity.