Originally Posted by slls
Get it scanned, no point guessing.
+1 to that. Second, and IAC vavle will not cause power loss it will stick open and will cause high idle. If its fly by wire it means it has an electronic throttle body, not cable drive like the older cars (all the way up to about 2004 is when it got popular to have electronic TBs). The ECM controls AFR by open/closed loop mapping. Its all electronic. Tis one of the reasons I try to stay away from newer cars. They have too many electrical issues.