I just put on my 02 sims last night and cleared out the ses light and this morning it came back on? From what I have read you are supposed to put the 02 sims on the rear connector's right? What about the front one's, would they cause me to throw a light and if so how do I fix it?

 

don't use the o2 sims up front they are worthless

 

Your SES light could very well have nothing to do with your O2s. Go have it checked and find out for sure what you're dealing with ...

Good Luck