P0507 — Idle Air Control System RPM Higher Than Expected
Drive with caution — fix soon.
What P0507 means
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.
Common symptoms
- Check engine light is on
- Higher-than-normal idle speed
- Engine revving up at stops
- Car feels like it creeps forward at idle
- Hissing sound from a vacuum leak
Common causes
- Vacuum leak in intake hoses or gaskets
- Stuck-open idle air control valve
- Dirty throttle body causing incorrect airflow
- Faulty throttle position sensor
- Leaking intake manifold gasket
Typical repair cost
$100 – $450
Varies by vehicle and root cause.
Frequently asked questions
Can I drive with a P0507 code?
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.
How much does a P0507 repair cost?
Typically $100 to $450, depending on whether it's a vacuum hose, a gasket, or an idle air control valve.
Is P0507 serious?
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.
Why does a vacuum leak cause a high idle?
Extra unmetered air sneaks into the engine past the throttle, so the engine runs faster than the computer intends at idle.