P0508Mazda Cx-50Years: 1996 - 2026
Idle Air Control System Circuit Low
Reviewed by ASE Certified Technician
What does this mean?
Code P0508 indicates a problem with the idle air control system or brake switch.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Mazda Cx-50 models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
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Common Causes
Dirty or faulty throttle body
Vacuum leak in intake system
Faulty brake light switch
Damaged, chafed, or broken wiring harness
Symptoms to Watch For
- Check Engine Light is illuminated
- Rough or unstable idle
- Abnormally high idle speed
- Abnormally low idle speed
- Engine stalling or dying unexpectedly
- Erratic or fluctuating idle speed