P0724 moderate

Torque Converter/Brake Switch B Circuit High

The P0724 code means the vehicle's onboard diagnostic system has detected: Torque Converter/Brake Switch B Circuit High. This is a moderate severity code.

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Keep driving?
Yes, but fix soon
DIY difficulty
easy
Estimated cost
$20 - $120 (parts and labor)
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ANCEL AD310 OBD-II Scanner

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Common Symptoms

  • Check Engine Light illuminated
  • Brake lights stay on constantly
  • Cruise control will not engage
  • Torque converter clutch stays released

Probable Causes (Ranked by Likelihood)

  • Misadjusted brake light switch (always closed) Very High
  • Short to voltage in brake switch circuit High
  • Faulty brake light switch stuck closed Moderate
  • TCM input circuit fault Low

Step-by-Step Diagnostic Procedure

  1. Check if brake lights are on with the pedal released -- if so, the switch is misadjusted or stuck

  2. Adjust the brake light switch so it releases when the pedal is in the rest position

  3. Check for short to voltage in the brake switch wiring

  4. Replace the brake switch if adjustment does not resolve the issue

  5. Verify the fix by checking that cruise control engages normally

Frequently Asked Questions

Can I drive with code P0724?

Drive short distances only. Torque Converter/Brake Switch B Circuit High can cause unsafe or unpredictable transmission behavior.

What causes P0724?

The most common cause is a faulty sensor or wiring issue. Misadjusted brake light switch (always closed) is the most likely cause.

Is P0724 expensive to fix?

Typical repair costs range from $20 - $120 (parts and labor). Sensor replacement is the most common fix.

Sources

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

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