P0505 Empowering You to Diagnose and Fix Throttle Position Sensor Issues

How to test and replace idle air control valve ! CODE P0505 ! Quick and Easy Fix ? Hi guys, The problem with this car is that after starting ... You made multiple changes to the motor that all change the cylnder fill rate. That would require a new map. The code might be from an IAC issue ... 1st- I believe the IACV is shorting due to it overheating. Both bad IACV's showed no signs of deterioration in the coolant channels, just bad impedance ... P0505 - Idle Control System - OBD2 Trouble code: ✓ Meaning ✓ Causes ✓ Symptoms ✓ Diagnostics ✓ Repair guides ✓ Repair costs ➤ Keep your car healthy. 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. The ODBII code P0505 indicates a malfunction in the idle control system, which regulates the engine's idle speed. A code indicating your idle air valve is bad or stuck. Many times a quick clean with carb cleaner fixes the problem. Sometimes a replacement is needed. The truck doesn't want to idle at start up so I have to give it a little throttle for a few seconds - maybe 10 seconds or so then it idles and drives fine. P0505 can be caused by not only a bad IACV but also a vacuum leak, misadjusted idle speed, bad ECT sensor/circuit, or bad TPS sensor/circuit. P0505 Is a malfunction in the Idle Air Control system. The IAC valve is probably sticking. Only you can determine if you have the ability to do ...