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.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $20 - $120 (parts and labor)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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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
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?
Estimated repair costs range from $20 - $120 (parts and labor). Sensor replacement is the most common fix.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Check if brake lights are on with the pedal released -- if so, the switch is misadjusted or stuck
-
Adjust the brake light switch so it releases when the pedal is in the rest position
-
Check for short to voltage in the brake switch wiring
-
Replace the brake switch if adjustment does not resolve the issue
-
Verify the fix by checking that cruise control engages normally
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- 2003-2015 Ford F-150
- 2004-2016 Chevrolet Silverado
- 2005-2017 Toyota Tundra
- 2002-2014 Honda Pilot
Related Codes
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