ABS Brake Fluid Level Switch Circuit High
The C0103 code means the vehicle's onboard diagnostic system has detected: ABS Brake Fluid Level Switch Circuit High. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- easy
- Estimated cost
- $100 - $400 (parts and labor)
Basic scanners cannot read ABS codes. BlueDriver reads all systems including ABS, SRS, and transmission through your phone.
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Basic scanners cannot read ABS codes. This one reads all four systems so you know exactly which sensor failed.
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Common Symptoms
- ABS warning light on
- Brake fluid warning light on
- Low brake fluid indicated on dash
- Traction control may be disabled
Probable Causes (Ranked by Likelihood)
- Low brake fluid level Very High
- Failed brake fluid level switch High
- Corroded fluid level sensor wiring Moderate
- Faulty float in master cylinder reservoir Low
Step-by-Step Diagnostic Procedure
-
Check brake fluid level in master cylinder
-
Inspect fluid level switch connector
-
Test fluid level switch operation
-
Check for brake fluid leaks
Frequently Asked Questions
What does code C0103 mean?
C0103 indicates a fault in the brake fluid level switch circuit high that affects ABS and related safety systems.
Can I drive with C0103?
You can drive short distances, but ABS and stability control may be affected.
How much does it cost to fix C0103?
Typical repair costs range from $100 - $400 including parts and labor.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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