C0024 moderate

ABS Brake Switch Circuit Range/Performance

The C0024 code means the vehicle's onboard diagnostic system has detected: ABS Brake Switch Circuit Range/Performance. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
moderate
Estimated cost
$30 - $200 (parts and labor)
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LAUNCH CRP123X (Reads ABS + Chassis)

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Common Symptoms

  • ABS warning light on
  • Intermittent brake light operation
  • Cruise control cuts out unexpectedly
  • Traction control intermittent

Probable Causes (Ranked by Likelihood)

  • Worn brake light switch Very High
  • Brake pedal free play out of specification High
  • Intermittent wiring connection at switch Moderate
  • Corrosion at brake switch connector Low

Step-by-Step Diagnostic Procedure

  1. Monitor brake switch signal on scan tool while pressing pedal

  2. Check brake pedal free play and adjustment

  3. Inspect brake switch connector for corrosion

  4. Test brake switch circuit for intermittent dropouts

Frequently Asked Questions

What does range/performance mean for the brake switch?

The switch signal is not switching cleanly or is fluctuating unexpectedly.

Can brake pedal adjustment fix this code?

Yes, if pedal free play is excessive, adjusting the switch or pedal position can resolve it.

Why does cruise control also stop working?

The brake switch signal is shared between ABS and cruise control systems.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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