P0838

Test 1 - 2:

Test 3 - 6:

SYMPTOM
P0838-4WD MODE SENSOR LOW

WHEN MONITORED
Continuously with the ignition key on.

SET CONDITION
When the 4WD Mode Sensor input circuit voltage falls below 0.3 volts for 5.72 seconds.

POSSIBLE CAUSES
- Transfer case position sensor input circuit short to ground
- Transfer case position sensor input circuit short to sensor return circuit
- Transfer case position sensor
- Powertrain control module
- Intermittent operation