P0724 Code: Brake Switch B Circuit High
🟠 Moderate severity · drivable
You can keep driving, but check that your brake lights still work and that cruise control behaves normally.
What P0724 means
Circuit B of the brake switch is reading too high, which usually means an open circuit, a short to power, or a faulty switch. The computer may think the brakes are pressed when they aren't, which can affect torque converter unlock and cruise control.
Symptoms
- Check engine light is on
- Cruise control may not work
- Brake lights may stay on or not come on
- Torque converter unlock may behave oddly
Common causes
- most common: Faulty brake switch
- common: Open wiring or loose connector
- common: Wiring shorted to power
- less common: Misadjusted brake pedal switch
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Check brake light operation and fuses | Yes | $5–20 |
| Adjust or replace the brake switch | Yes | $20–80 |
| Repair open or shorted wiring | Mechanic | $80–250 |
Frequently asked questions
Can I drive with a P0724 code?
Yes, but check that your brake lights work correctly. If they stay on or don't come on, fix the switch right away.
What is the difference between P0719 and P0724?
Both are brake switch B circuit faults. P0719 means the signal is reading too low, while P0724 means it's reading too high. Both usually point to a bad switch or a wiring problem.
How much does it cost to fix a P0724?
A new brake switch costs about $20–$80 and is often a DIY job. Wiring repairs add a bit more.
Related codes
P0703
P0703 Code: Brake Switch B Circuit
P0719P0719 Code: Brake Switch B Circuit Low
P0700P0700 Code: Transmission Control System Malfunction
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.