P0724 means Torque Converter/Brake Switch B Circuit High. The brake switch input used by the transmission is higher than expected, so the computer may think the brake is pressed when it is not. It is a generic OBD-II code, so the definition is the same on any make, but the most likely cause varies by engine; confirm with a scan tool and the service information for your vehicle before buying parts.
What P0724 means
Electronically controlled automatics are run by a transmission control module (TCM), a separate box or part of the engine computer. It reads speed sensors, the range sensor and fluid temperature to decide when to shift, and drives solenoids that apply clutches and the torque converter clutch. Many basic code readers only show the generic P0700; a scan tool that reads the transmission module shows the specific fault. Check fluid level and condition first, since low or burnt fluid causes many transmission codes.
P0724 symptoms
- Torque converter not locking up
- Cruise control not working
- Brake lights stuck on on some vehicles
Common causes of P0724
- Misadjusted or stuck brake switch
- Wiring shorted to voltage
- Broken pedal stop bumper
How to diagnose P0724
- Check brake lights with the pedal released
- Watch the brake switch input on a scan tool
- Check switch adjustment and pedal bumper
Can you drive with P0724?
Make sure the brake lights work correctly before driving.
P0724 tips
A brake switch that sticks on can keep the converter unlocked and the brake lights on; check both.
Will P0724 clear itself?
If the fault stops, the computer turns off the check engine light by itself after several drive cycles without seeing it again, and the code stays in memory as history for a while. Clearing P0724 with a scan tool after a repair is fine, but if the cause is still there the code returns, sometimes within one drive. Disconnecting the battery also clears codes on most vehicles, but it erases learned fuel trims and idle settings as well.
Related codes
| Code | Meaning |
|---|---|
| P0703 | Brake Switch B Input Circuit |
| P0719 | Torque Converter/Brake Switch B Circuit Low |
| P0571 | Brake Switch A Circuit |
Guides that help
When it is more than a sensor
If the fault turns out to be internal (worn clutches, a failed converter or a damaged valve body), compare a rebuild with a replacement in transmission rebuild vs replacement and transmission replacement cost, identify your unit with what transmission do I have?, and browse our transmissions.
Shipping is a flat $80.00 per order to US addresses, with 15-day free returns. Questions? Ask a parts specialist.