P1829
Transmission Transfer Case Counter Clockwise Shift Relay Coil Open Circuit
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–33 (est.)
Symptoms
- Inability to switch transfer case modes
- Check Engine light comes on
- Transmission transition to emergency mode
- Reduced vehicle dynamics
Causes
- Open circuit in the relay coil circuit
- Poor contact in connectors
- Faulty relay
- Wiring harness damage
- Transmission control module (TCM) problems
How to Fix
- Check the continuity of the relay coil circuit
- Inspect and clean the connector contacts
- Check relay functionality
- Replace damaged wires or relays
- Check the operation of the transmission control unit