P1854
Transmission Transfer Case Contact Plate 'C' Circuit Failure
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
- All-wheel drive system does not work correctly
- The car may go into emergency transmission mode
- Possible jerking when changing gears
Causes
- Open or short circuit in the contact plate circuit
- Oxidation or poor contact in connectors
- Transfer case contact plate malfunction
- Wiring harness damage
- Problems with the transmission control unit
How to Fix
- Check the integrity of the wiring harness to the transfer case
- Clean the contacts in the contact plate connectors
- Check the contact plate circuit resistance
- If necessary, replace the contact plate
- Check and, if necessary, replace damaged wires