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the throttle module is a very sensitive piece of equipment your car uses to idle, run etc. you will notice the idle will start to surge when stopping, also the idle will drop very low when coming to stops as well. what is happening is the small opening around the valve is getting carbon buildup and eventually the valve will become partially blocked not letting the car breath on idle. this problem will also set amm codes and other wonderful treats for you. the etm light will turn on once the car registers the flow fault, or the internal failure it is inevitable.
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