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I Replace the IACM 2 years ago and Now the check engine light is on again What do I do

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HI there

I would remove the IAC and clean it up with some brake cleaner to get it working again. It's possible the pintal is sticking and causing the issue. That being said, any time the engine RPMs are too high, this code will appear, so if you have a vacuum leak, it's going to cause high engine speed and this code.

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