OBD codes / P0507
P0507
ModerateIdle Air Control System RPM Higher Than Expected
P0507 is generally safe to drive with, though a high idle can make the car creep at stops and feel less controlled. It's low-risk mechanically. Because a vacuum leak is the usual cause (and also leans the mixture), it's worth a smoke test before replacing parts.
What this code means
P0507 is the opposite of P0506: idle speed is running HIGHER than the computer's target. The classic cause is a vacuum (air) leak — extra unmetered air sneaks in past the throttle and raises idle. A dirty throttle body that doesn't close cleanly, a stuck-open IAC valve, or a leaking PCV or intake gasket can do the same. Because a vacuum leak also leans out the mixture, P0507 often shows up alongside lean codes like P0171.
Symptoms you might notice
- High idle that won't settle to normal
- Idle hangs up between shifts or when slowing
- Possible hissing from a vacuum leak
- Sometimes paired with a lean code (P0171/P0174)
- Check-engine light
What it costs to fix
Typical range: $50–$500 · about ~0.3–2 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Vacuum / intake leak repair | $10–$150 | ~0.5–2 hrs |
| Throttle body cleaning | $8–$20 | ~0.3–1 hrs |
| Idle air control (IAC) valve | $30–$150 | ~0.3–1 hrs |
A vacuum leak is the most common cause and the cost depends on which hose or gasket it is — often cheap, occasionally an intake gasket job. A throttle-body clean or IAC valve is modest. A smoke test usually finds the leak quickly.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0507 for my exact vehicle →
Frequently asked
Can I drive with P0507?
Usually yes — a high idle is more annoying than dangerous, though the car may creep at stops, so use a little extra brake. Get the vacuum leak found and fixed when convenient.
What usually causes P0507?
A vacuum (air) leak is the most common cause — extra air raises the idle. A dirty throttle body, a stuck IAC valve, or a leaking PCV/intake gasket can also do it. A smoke test is the quickest way to find a leak.
Why do I have P0507 and P0171 together?
Because a vacuum leak causes both: the extra air raises idle (P0507) and leans the mixture (P0171). Fixing the single leak typically clears both codes at once.
How much does it cost to fix P0507?
Often inexpensive — a vacuum hose or a throttle-body clean. It rises only if the leak is at an intake gasket that takes real labor to reach. Confirm the leak location before parts.
Seeing P0507 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0507 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.