Drive with caution — fix soon.
P0507 means the engine idles higher than the computer expects. The most common cause is unmetered air entering the engine, often from a vacuum leak or a stuck-open idle air control valve. The car may rev higher than normal at stops and feel like it's pulling forward.
$100 – $450
Varies by vehicle and root cause.
Usually yes, but a high idle can make low-speed driving and braking feel odd. Get it diagnosed soon, especially if you hear a vacuum leak.
Typically $100 to $450, depending on whether it's a vacuum hose, a gasket, or an idle air control valve.
It's moderate. The high idle is more of an annoyance and a sign of a leak than an immediate danger, but it's worth fixing.
Extra unmetered air sneaks into the engine past the throttle, so the engine runs faster than the computer intends at idle.