put the air filter tube back on. no cel and all is ok.

get your battery tested at a parts store. have it load tested, and its volts car off. then test the volts car running.

the load test will tell if the battery is shot or not, volts whould be right at 12 car off. iff way less its bad.

car running you want to see 13 or more volts. if you see 12 or less, the alt is shot, replace it.