Okay here is the situation. On and off all last winter, my CEL would light up with a PO13? (slow response, sensor 1, bank,1). It would stay on for a couple starts and then go out. Made all through the summer without it coming on at all. Well the weather has turned cool again and now that little pita is starting to do it again. Now I am getting PO133 (same code, different sensor). I know what it is and what it means but what I want to know is if this is going to cause any problems later on. The system apparently does not store the code and the stealership will not repair it unless the light is on. Any input would be appreciated. I really do not want to replace anything as this should be under warranty.