What does code P0505 mean?
A general malfunction is detected in the idle control system, including the IAC valve or electronic throttle body.
OBD-II Code
P0505 — Idle Control System Malfunction
A general malfunction is detected in the idle control system, including the IAC valve or electronic throttle body.
Common symptoms
- Engine stalls at idle
- surging
- unstable idle speed
Possible causes
- Dirty IAC valve
- dirty throttle body
- vacuum leaks
Initial recommendation
Clean idle air control valve and throttle body, inspect for vacuum leaks.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0505 with your vehicle's actual symptoms for more complete diagnostic guidance.
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