2000 infinity g20t 2 liter 4 cylinder

Question

Air idle control code still comes up even after I changed the control valve and the idle is fine, is there any other cause that could cause this code p0505 to come up still

Answer 1

Hi there,

Sometimes you can get this code even if the idle is slightly high, there is a wiring issue to the IAC valve or the computer. If there is a vacuum leak or a problem with the transmission range sensor it can cause it. Even though the idle seems fine, the computer isn't happy with it. This code rarely is actually a problem with the IAC and more often an issue causing a high idle.