I did a self diagostic and i found out that my front left heated 02 sensor is bad, should i replace it? would it hurt my max if i didn't.

also what does it do? and could i replace it my self?

 

Replace it if it is bad. That's what our computers are for--to monitor the performance of the car. If something is wrong, the code tells us which and what sensors are bad, and needs immediate attention and replacing. Ignoring it will possibly harm other factors in performance further down the line. If I were you, buy the sensor and install the sensor yourself. It's not difficult at all. If you have access to a Haynes manual, you can locate the harness and follow it to the sensor. All you need is an 02 sensor socket to get it off. I hope this helps any. Please, I hope you don't take any offense at all to this reply. I'm looking out for you and just trying to help.

 

man ignored replacing the o2 sensor on my maxima .. and look what happened all of a sudden my car started missing and trembling today ..... cant figure out why ,,, i ignored the o2 sensor replacement for just 2 weeks or so .. and drove with the check engine light