Thanks, took it to the stealership this morning and they replaced "bank 1" o2 sensor. They said it was not responding to the computer, and throwing a "heat resister" code. I was nervous cause I was waiting for the "sir, you put an aftermarket exhaust on your car, so this is not under warranty" but they didn't say a word about the exhaust.

 

Cool, sounds like you got it fixed then.