P1874
Transfer Case Hall Effect Sensor Power Circuit Failure
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–89 (est.)
Symptoms
- Check Engine Light Is On
- Problems with switching all-wheel drive modes
- The car may go into emergency mode
- Unstable operation of the transfer case
- Errors in the operation of the all-wheel drive system
Causes
- Malfunction of the Hall sensor of the transfer case
- Open or short circuit in the sensor power supply circuit
- Poor contact in sensor connectors
- Problems with the sensor circuit fuse
- Transfer case control unit malfunction
How to Fix
- Check sensor circuit fuse
- Inspect the sensor wiring and connectors for damage
- Check the supply voltage at the sensor
- Test the Hall sensor with a multimeter
- If necessary, replace the Hall sensor