P0505 Demystifying Throttle Position Sensor Malfunctions and Repairs

2004 Toyota Matrix XR with only 111000 miles. 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. The IACV valve is operated by a step motor. This motor has winding phases and is actuated by the output signals of ECM. Problem solved! It seems the "Wise One" here installed the EGR valve with no gasket. This allowed the hold down nuts to loosen (or they were ... 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 ... How to fix a P0505 engine code: Idle Control System. A P0505 code is set when the computer detects the engine RPMs at Idle are erratic. Hey, Guys I need help with this. I've already tried cleaning the idle air control valve and the throttle body I cant get this to go away. Anyone have. VSC/OFF, engine light, three lights come on together. kinda scare to me. after i got home, i used the code reader, it's P0505,, idle air control ... Possible Causes of P0505 · IAC mechanical malfunction · Throttle body clogged port · Intake manifold gasket leak · Intake snorkel or hose leak ... I own a 2001 Cherokee Sport. Recently I've been having an issue with my RPM at idle. It surges anywhere from as low as 300 RPM to as high as 1400 RPM.