P0507 What does it mean?
Can you drive, what causes it and how it shows.
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Common codes
P0507
Idle Air Control System RPM Higher Than Expected
Idle RPM exceeds the target despite the IAC commanded fully closed. Almost always caused by a vacuum leak that lets air bypass the IAC, torn intake hose, leaking PCV, brake booster, or intake manifold gasket.
Can you drive?
“You can drive, but see a mechanic soon”. This code turns on the check light. Better have it checked soon.
9,533trouble codes explained in plain words, free.
What causes it
The most likely cause comes first. Some you can fix yourself.
- 1Vacuum leak bypassing IAC
- 2PCV valve stuck open
- 3Brake booster diaphragm leaking
How it shows
Usually it shows like this.
- Check engine light on
- Idle speed too high, too low, or unstable
- Possible stalling at idle or after cold start
In the app
Partly freeExplaining a trouble code is free: 9,533 codes, offline. With an adapter the app reads the code itself and tells you whether you can drive. A sample scan is free; unlimited scans come with VINARI+.
Common questions
What does P0507 mean?
P0507: Idle Air Control System RPM Higher Than Expected. Idle RPM exceeds the target despite the IAC commanded fully closed. Almost always caused by a vacuum leak that lets air bypass the IAC, torn intake hose, leaking PCV, brake booster, or intake manifold gasket.
Can I drive with P0507?
“You can drive, but see a mechanic soon”. This code turns on the check light. Better have it checked soon.
What causes P0507?
Most often: Vacuum leak bypassing IAC, PCV valve stuck open, Brake booster diaphragm leaking.
How do I find out which code my car has?
Plug an ELM327 OBD adapter into the OBD-II port under the steering wheel and tap “Scan” in VINARI. The app reads the code, explains it and tells you whether you can drive.
Do I still need a mechanic?
Yes. The app tells you what is going on and how urgent it is; the final word belongs to the mechanic.
Other topics
Source: OBDex (CC0), VINARIUpdated 2 November 2026
