P0507 on a Mazda: Causes, Fixes & Repair Cost
🟠 Moderate severity · drivable
Drivable, but the engine idles too fast, which wastes fuel and makes low-speed driving feel odd.
What P0507 means on a Mazda
On a Mazda, P0507 means the engine is idling faster than the computer expects. Too much air is entering at idle, usually through a vacuum leak or a dirty throttle body. The car still drives, but the high idle wastes fuel.
Is P0507 common on Mazdas?
P0507 appears on Mazdas like the Mazda3, Mazda6, CX-5, and MX-5, most often on higher-mileage cars. Rubber vacuum hoses crack with age, and carbon builds up in the throttle body. Older models with an idle air control valve can also trigger the code.
Commonly reported on: Mazda3, Mazda6, CX-5, MX-5.
Symptoms
- Check engine light is on
- High idle speed
- Engine surges at idle
- Car creeps forward at stops
Common causes
- most common: Vacuum leak
- common: Carbon buildup in the throttle body
- common: Faulty idle air control (IAC) valve on older models
- less common: Leaking PCV valve or hose
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Find and repair vacuum leaks | Yes | $10–100 |
| Clean the throttle body | Yes | $10–40 |
| Replace a faulty idle air control valve | Yes | $50–200 |
Frequently asked questions
Other common Mazda codes
P0507 on other brands
Looking for the full (non-brand-specific) guide? See the P0507 code page →
Browse all Mazda codes: Mazda hub →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.