04 ram check enigine light

I changed the plugs they didnt look that bad elctrode was still there. I got them changed started it. I put some lucas oil injector cleaner in when i fill it up with gas. The light went out for a day came back on today. It started stumbleing when i first start it up again. It runs ok when it warms up. I really wish I could figure it out. I put it on a scanner again before I changed the plugs. It just said the intake air temp senser and #1 cylinder misfire. Nothing about caliytic convertor