I paid around $600 with labour and taxes. I got mine done at BMW thats why. Just the sensor was around $400Was going to go next week for Easy Care inspection . Think they will sign me up on a Total Care package with the CEL on? How much the dealership get for an O2 installed?
I was going to say the exact same thing. Happened to me a couple of times after the wife filled up the car. Apparently she has weak cap twisting mucles. When this happens now I follow the following steps: 1. Go to station and fill up with quality gas, 2. screw cap on tight, 3 wait a day or so. It has always gone away. If not .. then start trying stuff that costs money.Also, make sure the gas capis on tight. Same thing happened to me and after removing the gas cap and putting it back on, light went away.