I have a 01 4runner v6, the check engine light came on code is p0505. I did a search and found idle control system malfunction. If i clean or replace iac will this fix the problem ? The check engine light went off today and did not come back on so far.

 

Just because the engine light went off, does not mean the code is gone.

http://www.ncttora.com/fsm/2000/Repa...ngine/dtcc.pdf

It is possible. Do the list here in order.