it is a very stupid thing on the engine forit is made to keep its name throttle positioning sensor it is made to keep the Tb at a perfect angle for some reason THE BAD THING ABOUT CHANGEING THESE IS YOU MUST!!!SET IT UP PERFECT TO THE POINT OR THE CAR will not run right i will say if you have the money please take it to honda and let pop the old one out and do the new one i dont no if i even explaned anything just now but when replacing you have to MARK and set the new one perfect thats all i can say