So my car's CEL has been on for the past few days. About two weeks ago I had it scanned and it turned up as P0153. Right after that, I ran it hard as I was going home and it disappeared. It came back on a few days later. So today I ran it hard to redline and the CEL shut off again.
So the question is, should I go ahead and replace my O2 sensor or just wait until it stays on for awhile? Is that code a big deal? Thanks.
