Quote:
Originally Posted by chiefcorey
These post cat sensors will post codes, but as they dont' affect the performance of your vehicle, most people never bother replacing them.
As you've already changed the pre-cat ones, you should be in good shape and there is no real need to spend the money of the post cat ones.
|
Unfortunately, A good portion of U.S. vehicles are located in areas which require emissions inspection... vehicles will not pass with faulty post-cat sensors. Additionally, if you don't fix them, your will have a constant SES light and will never know when a "real" code appears, e.g., you'll have to do periodic OBD-II code checks if you want to know if a "real" fault has developed, e.g., if I develop an intake leak and start running lean, I would like to know there is a problem as soon as the computer detects it and turns the SES light on.