C0408
Rear Axle Coupling Solenoid Valve
C0408 is an OBD-II diagnostic trouble code meaning: Rear Axle Coupling Solenoid Valve. Common causes: open or short circuit in wiring harness, solenoid valve malfunction. Estimated repair cost: $56–167.
Symptoms
- Incorrect all-wheel drive operation
- All-wheel drive warning light comes on
- Reduced controllability on slippery surfaces
- System transition to emergency mode
Causes
- Open or short circuit in wiring harness
- Solenoid valve malfunction
- Problems with the hydraulic clutch system
- Valve dirty or stuck
- Malfunction of the four-wheel drive control unit
How to Fix
- Check solenoid resistance
- Inspect the wiring harness for damage
- Check the pressure in the hydraulic system
- Clean or replace solenoid valve
- Test the all-wheel drive control unit
Related codes
Error C0408 by Vehicle Brand
FAQ
What does the C0408 code mean?
C0408 is an OBD-II diagnostic trouble code that indicates: Rear Axle Coupling Solenoid Valve
What causes a C0408 error code?
The most common causes of C0408 include: Open or short circuit in wiring harness; Solenoid valve malfunction; Problems with the hydraulic clutch system; Valve dirty or stuck.
How do I fix a C0408 diagnostic trouble code?
To fix C0408: Check solenoid resistance. Inspect the wiring harness for damage. Check the pressure in the hydraulic system. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0408?
Limited driving only, diagnose soon
How much does it cost to fix C0408?
The estimated repair cost for C0408 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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