P1828
Transmission Transfer Case Counter Clockwise Shift Relay Coil Circuit Failure
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Check Engine Light Is On
- Problems with switching all-wheel drive modes
- Transfer case does not shift to counterclockwise mode
- Reduced vehicle dynamics
- Possible noises from the transfer case
Causes
- Faulty switch relay
- Open or short circuit in the relay circuit
- Wiring Harness Problems
- Transmission control module (TCM) malfunction
- Corrosion of relay contacts
How to Fix
- Check the condition of the switching relay
- Check the integrity of the circuit and wiring harness
- Check relay contacts for corrosion
- Replace the faulty relay if necessary
- Check the operation of the transmission control unit