Throttle Position Sensor Diagnostics (P0505) A Journey from Problem to Solution

A CEL popped up with code P0505 "Idle Air Control Motor Circuit," and it started idling much higher than usual (probably 1500 RPM). The P0505 code means there is a short in the IAC valve circuit. I replaced the valve, check the wiring and old valve - both where ok. I'm ... The error code you received is for a faulty IAC valve but it probably is related to the idle speed that you fiddled with.... The ECM regulates ... This code is triggered if the IAC pintle is 100% open and the idle RPM is more than 200 RPM lower than the ECM idle RPM setpoint value. Claim your FREE engine code eraser https://free.nonda.co ============================= nonda Auto DIY Center is the biggest auto DIY ... His suggestion was to take off the Throttle body assy, remove the IAC Valve, take it apart, clean it thoroughly, and lube with WD-40. It worked. 2001 Toyota Corolla code P0505 showing idol control malfunction how do we fix this. Reply 1: Remove and clean the IAC idle air ... P0505 means an irregular voltage detected in any IAC circuit. Our expert mobile mechanics can diagnose and fix your P0505 trouble code wherever you are. P0505. IDLE CONTROL SYSTEM MALFUNCTION. CIRCUIT DESCRIPTION. The rotary solenoid type ISC valve is located under the throttle body and intake air bypassing the ... 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.