OBD-II Generic Error Code P0505: How to Fix It

Q: Can I drive with P0505?

It's not recommended. Rough idling and stalling can be dangerous. Fix the issue promptly.

Q: Will P0505 clear itself?

If the problem is intermittent, the code may clear after several good drive cycles, but it often returns until fixed.

Q: How much does it cost to fix P0505?

DIY cleaning costs under $20 for cleaner. Replacing an IAC valve costs $50-$200. Professional repair ranges $100-$400.

Q: Can a vacuum leak cause P0505?

Yes, vacuum leaks can disrupt idle control and trigger P0505. Check hoses and intake gaskets.

Q: What is the most common fix for P0505?

Cleaning the idle air control valve and throttle body, or replacing the IAC valve.

Abstract

Error code P0505 indicates a problem with the idle control system, which manages engine idle speed. This can cause rough idling, stalling, or hesitation. Our guide walks you through common fixes, from cleaning the idle air control valve to checking vacuum leaks.