C0378
Front Axle Switch Circuit Signal Invalid
C0378 is an OBD-II diagnostic trouble code meaning: Front Axle Switch Circuit Signal Invalid. Common causes: open or short circuit in wiring harness, oxidation of switch contacts. Estimated repair cost: $56–167.
Symptoms
- Incorrect operation of the stabilization system
- Activating the Check Engine Light
- Problems with switching all-wheel drive modes
Causes
- Open or short circuit in wiring harness
- Oxidation of switch contacts
- Front axle switch malfunction
- Problems with the ECU
How to Fix
- Check the integrity of the wiring harness
- Clean switch contacts
- Check the functionality of the switch
- Replace switch if necessary
- Check the ECU for errors
Related codes
Error C0378 by Vehicle Brand
FAQ
What does the C0378 code mean?
C0378 is an OBD-II diagnostic trouble code that indicates: Front Axle Switch Circuit Signal Invalid
What causes a C0378 error code?
The most common causes of C0378 include: Open or short circuit in wiring harness; Oxidation of switch contacts; Front axle switch malfunction; Problems with the ECU.
How do I fix a C0378 diagnostic trouble code?
To fix C0378: Check the integrity of the wiring harness. Clean switch contacts. Check the functionality of the switch. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0378?
Limited driving only, diagnose soon
How much does it cost to fix C0378?
The estimated repair cost for C0378 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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