Drive with caution — fix soon.
This code is set when the computer reads a lower-than-expected voltage on the cruise control / brake switch 'A' circuit. The typical causes are a failing brake light switch, a short to ground in the wiring, a loose or corroded connector, or a blown fuse. Since this circuit is also tied to brake lights on many cars, it's worth fixing soon, and repairs usually involve replacing the switch or fixing the wiring.
$100 – $350
Varies by vehicle and root cause.
Usually yes, but don't delay too long. The same circuit often runs your brake lights, and if those fail, drivers behind you won't see you braking. Have it checked soon.
Typical repairs run $100 to $350. Replacing the brake light switch is cheap, while tracing down a wiring short or replacing a module costs more.
It's moderate severity. The car drives fine, but because the brake switch can affect brake lights and the shift interlock, it's worth fixing promptly for safety.
It means the computer is seeing less voltage than it expects on the brake switch circuit, often from a short to ground or a failing switch. The system reads this as an invalid signal and stores the code.