You need to get more info. Get the codes read either by yourself or through the dealer. Even if the lights/codes come and go, you need to get this info however you can. Usually, you would just get the CEL light only but since the engine and trac/abs share inputs, when one light goes off, it will trigger the other as well. There was a recall for early 11th gen LE ECO models but since you have a S, this shouldn't apply to you. So like I said, before you jump to conclusions, get the code read.