P0505Renault ZoeYears: 1996 - 2026
Idle Air Control System Malfunction
Reviewed by ASE Certified Technician
What does this mean?
Code P0505 indicates the PCM has detected a malfunction in the idle air control (IAC) system, which regulates engine idle speed.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Renault Zoe 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
Damaged, chafed, or broken wiring harness
PCM/ECM software needs update (TSB)
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