P0573 Code: Brake Switch A Circuit High
🟠 Moderate severity · drivable
The brakes themselves still work, but the brake lights or cruise control may act up. Check the brake lights before driving.
What P0573 means
The brake pedal switch, also called the stop lamp switch, is sending a high voltage signal to the engine computer. This usually means the circuit is shorted to power or the switch is stuck, so the computer gets a signal even when the brake isn't pressed.
Symptoms
- Check engine light is on
- Brake lights stay on all the time
- Cruise control won't engage or keeps turning off
- Shifter may not release from park in some cars
Common causes
- most common: Faulty brake light switch
- common: Short to power in the switch wiring
- common: Misadjusted brake pedal or switch
- less common: Faulty engine computer
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Check the brake lights and adjust the brake pedal stop | Yes | $0–20 |
| Replace the brake light switch | Yes | $20–80 |
| Repair the shorted wiring | Mechanic | $50–200 |
Frequently asked questions
Can I drive with a P0573 code?
Yes, but if the brake lights stay on constantly, other drivers may be confused. Fix the switch or wiring soon.
What does a high brake switch circuit mean?
The computer is seeing too much voltage on the brake switch circuit, usually from a short to power or a stuck switch.
How much does it cost to fix a P0573?
A brake light switch is usually $20–80; wiring repairs run $50–200.
Related codes
P0572
P0572 Code: Brake Switch A Circuit Low
P0571P0571 Code: Brake Switch A Circuit Malfunction
P0565P0565 Code: Cruise Control On Signal
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.