Hi. There was a Thread posted some time back showing a pic of the Top of The Engine showing all the sensors and below was the Fault codes. Ive got Idle problem on Legacy Turbo and i think it could be the Throttle sensor Ie The one on the top right when you lift the bonnet. Its idles perfect to Start with then then creeps up to 1000 rpm or more then goes back to normal or it some times cuts out completly.

Thanks in Advance

Steve.

 

not sure about legacy engine but on impreza the top sensor is for idle control and the lower one for throttle position..mine is playing up when cold
starts and holds at 1100rpm bur after short while until engine warm if clutch depressed revs drop to 500 then pop up again..