service engine light

Ok so here is my situation. I bought my eclipse about 4 months ago and it has been driving great. Recently, the service engine soon light has come on. I replaced the gas cap after some testing and the light went off for a couple days. It later came back on and gave me the same code which is...

Road trip down the interstate and my Service Light Comes on, so i pull off, check the gas cap, pop the hood. nothing strange. I keep driving and mileage is fine (replaced all 4 O2 sensors a few monthes ago) and the engine wasn't overheating or making any noises. Get to where I'm going and swing...

My Service engine light came on and I cant get it to turn off. It came on because I made a custome intake and didnt tight one of the clamps tight enough and it was sucking air directly into the engine and passing the MAS. So I've tried the unplug the battery trick and its still on. Any other...