P1859
Transmission Transfer Case Contact Plate 'D' Open Circuit
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Check Engine Light Is On
- Problems with switching all-wheel drive modes
- Unstable operation of the all-wheel drive system
- The car can remain in one drive mode
- Possible errors in ABS operation
Causes
- Broken wires in the harness
- Oxidation of plate contacts
- Damage to the contact plate
- Short circuit in the circuit
- Control unit malfunction
How to Fix
- Check the integrity of the wiring harness
- Clean plate contacts
- Check contact plate resistance
- Replace damaged components
- Check the operation of the control unit