C0406

Transfer Case Solenoid Valve Control Circuit High Current

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Incorrect all-wheel drive operation
Transfer case transition to emergency mode
Reduced efficiency of the all-wheel drive system

Causes

Short circuit in solenoid control circuit
Transfer case solenoid malfunction
Wiring harness damage
Problems with the transfer case control module (TCCM)
Corrosion of contacts or connectors

How to Fix

Check the integrity of the wiring harness and connectors
Measure the solenoid resistance (compare with the norm)
Check control circuit for short circuit
Replace solenoid if necessary
Flash or replace the control unit (TCCM) if a malfunction is detected

Related codes

C0405 C0407 C0408