P0505 The Ultimate Diagnostic Tool for Idle Air Control System Problems

The code P0505 stands for “Idle Control System Malfunction,” which means that the powertrain control module (PCM) can't control the idle speed. My car has been acting goofy, and just the other day it spit out the P0505 code (which usually means bad IAC, but I'm looking for some expert advice). Toyota Corolla p0505 idle control system malfunction. 23K views · 2 years ago MILAN MALL ...more. Sai baba Auto electrical engineer. 3.67K. The check engine light is getting triggered when the PCM is in a closed loop operation. It also means that it is starting to monitor the OS2 sensor input. That doesn't mean that the P0505 error code is caused only by the failure of the idle air controller. Want to erase your check engine light and fix your P0505 ... The code sets when it can't get the idle speed within +200 / -100 of the target for more than x seconds, and it takes a failure in two successive drive cycles ... Detailed information on troubleshooting and repairing a P0505 DTC code which refers to a malfunction of the IAC (Idle Air Control) system. A P0505 is an Idle Air Control issue, it has nothing to do with the PCM. The IAC is what provides and controls all of the engine's air when the ... The whole point of an idle air control valve is to regulate the air coming through that bypass channel. If they are plugging it and it is going ... The error seems to happen before the Jeep ever starts, or the code does not get logged until the jeep is turned off.