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You need to determine the codes first so you will have an idea what the problem was instead of guessing and jumping all over the "probable" problems. Scan it once the code appear again.
I agree.
For all we know, you could need a new gas cap. lol
If the CEL is being caused by air turbulence, your new heat shield is not going to do anything for your CEL problem. You need one that closes off the filter from the rest of the engine bay.
Notice how the one on my car allows the scoop to bring in cooler air, but has a flap that keeps the air from directly blowing onto the filter.
Sorry for being off topic, but damn your engine bay is mean and clean. Going out to scrub mine right now at 9 PM!
Thanks for the links. The part number documents actually helped me. I have installed the hose wrong. Now I'm waiting for any engine lights.. Hopefully I don't get it lol