U0403

Invalid Data Received From Transfer Case Control Module

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–333 (est.)

Symptoms

Check Engine Light Is On
Problems with switching all-wheel drive modes
Reduced vehicle performance
Unstable transmission operation

Causes

Transfer case control module malfunction
Damaged wiring harness or poor connections
Software error in control module
Module power problems
Short circuit in signal circuits

How to Fix

Check wiring harness and module connectors
Check the module supply voltage
Scan for additional trouble codes
Update or reflash module software
Replacing the transfer case control module if necessary

Related codes

U0401 U0402 U0404