alright guys......... i am getting my car ready to sell and i have to fix a few things........ dont tell me i need to take it to the dealership b/c they are all assholes and try to screw me over..... first i need to fix my taillights. no fuses are blown and the brake and reverse lights still work, but i have no taillights...... as for the only other major thing, i have absolutely no clue what it is... CEL is on, car has trouble starting and bogs down through all rpm's.... dealer said my cat was gone, as in not on, i caught him in a lie, and pulled my car out....... i think it could be an o2 sensor but that is just a "s.w.a.g.". oh, and when i try to crank my car, it acts like the battery is almost dead thern it fores right up...... its a new battery......... can somebody please help me..... thanks