Ok, I have gone through a lot of treads and cant find this. I am asking weather or not my o2 sensor will throw a code only when it is totally gone, or will it just effect my rig and not let me know until it is all the way gone. do i only replace it when it throws the code, or do they sometimes need to be done before.
thanks

 

it can cause a the motor to run rich if it's almost dead. i'm ordering one as soon as i get payed from sparkplugs.com

 

make sure its denso, bosche o2sens dont work for our vehicles!