The computer fan is normal. You'd know if it quit working, 15 codes in 2 minutes. Slow VVT reaction time will trip the code, can be due to low/wrong oil or oil pickup/galley/mesh filter in CVVT clogged. Mine does the same, I feed it oil and it stops complaining. It usually takes a cycle or two for t...

Yes its annoying, it needs to sit behind the tensioner pulley (thats the trick) . Reach down with your hand and press the cover against the engine and the tab will go behind the pulley. I have broken the tabs on an old cover because i got angry with it and forced it down. Once you get it you will fi...

As above, takes patience