P1863
Transmission Transfer Case Contact Plate Power Open Circuit
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–167 (est.)
Symptoms
- Check Engine or 4WD/AWD light comes on
- Malfunction of the all-wheel drive system
- Inability to switch transfer case modes
- Unstable transmission operation
Causes
- Broken wires in the power circuit of the contact plate
- Oxidation or corrosion of contacts
- Transfer case contact plate malfunction
- Wiring harness damage
- Problems with the transmission control unit
How to Fix
- Check the integrity of wiring and connections
- Clean contacts from oxidation
- Check the condition of the contact plate
- Test the transmission control unit
- Replace damaged components if necessary