Drive with caution — fix soon.
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.
$100 – $350
Varies by vehicle and root cause.
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.
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.
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.
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.