Engine Code

Test 1 - 2:

Test 3 - 6:

SYMPTOM
PO839-4WD MODE SENSOR HIGH

WHEN MONITORED
Continuously with the ignition key on.

SET CONDITION
When the 4WD Mode Sensor input circuit voltage raises above 4.78 volts for 5.72 seconds.

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