My SES light came on a few months ago. I went to Autozone and they said its an O2 sensor - rear if I remember correctly.

I ignored it for a while and it went off. Then it came back on about a week later. Every now and then it flashes.

Lately, the car has been a dog under 3K. It feels like a turbo kicked in once it hits 3K.

I'm assuming that the O2 sensor has gotten to the point where it needs to be replaced or I'll sacrifice performance. Can anybody confirm?

I have a Random Tech cat - could that be the culprit?

Where is the best place to buy one? How much is it gonna set me back?

 

You should be able to buy one at autozone or somewhere like that. Id buy from Autozone since they let you diagnose for free.... Sensor for my 4th gen was around $50 a piece.

 

I got the same f*ckin problem, and i'll be doin the same thing.