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Originally Posted by JCWindstar
on a 2001 Windstar, would a faulty IAC valve cause the emissions warning light to come on?
I have been having trouble with the idle when the temperature is below 30 F so was instruct to clean the IAC valve. Did so, then the emmision warning light (the little yellow engine icon) came on about 2 miles later.
Would this be caused by the IAC? (I currently do not have a rader for the codes so am working "blind").
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Hi
yes there are fault code associated with the IAC. However, there are many, many codes that will trip the "check engine" light. Try and have the code read at an Autozone or similar store. They will do so for free. Then post back what you learn.