P0572 — Cruise Control/Brake Switch A Circuit Malfunction
Drive with caution — fix soon.
What P0572 means
This code means the computer detected a general problem in the cruise control / brake switch 'A' circuit, the signal that tells the system when you're pressing the brake. It's commonly caused by a faulty brake light switch, damaged wiring or connectors, or sometimes a blown fuse. Because this switch can also control your brake lights, it's worth fixing promptly, and the repair is usually a straightforward switch replacement or wiring fix.
Common symptoms
- Check engine light is on
- Cruise control won't engage
- Brake lights stay on, flicker, or don't work
- Cruise control doesn't disengage when braking
- Shifter may not move out of Park on some vehicles
Common causes
- Faulty brake light switch
- Misadjusted brake switch position
- Damaged wiring or connector at the brake pedal
- Blown fuse in the brake or cruise circuit
- Failing cruise control or body control module
Typical repair cost
$100 – $350
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0572 code?
Usually yes for short trips, but you shouldn't let it linger. The brake switch involved can affect your brake lights, so a fault could mean other drivers don't see you braking. Get it checked soon.
How much does it cost to fix a P0572 code?
Most repairs fall between $100 and $350. A brake light switch is an inexpensive part, but wiring repairs or a control module can increase the total.
Is a P0572 code serious?
It's moderate severity. The car still drives, but because the brake switch can control your brake lights and the shift interlock on some cars, it's worth addressing promptly for safety.
Could a P0572 code keep my car from shifting out of Park?
Yes, on some vehicles. The brake switch tells the transmission you're pressing the brake before allowing a shift out of Park, so a fault can sometimes lock the shifter until it's repaired.