Just figured out our 2000 4runner has CA emissions and I'm getting the famous P420 code and O2 sensors have been changed. I've been babying it for several month with the CEL going off and on, but now it is getting bad that I'm seeing lose of power and the car is rattling.
My main question at this point that I can't find a whole lot of opinions on:
Do I absolutely need to change both the front and rear?
My plan is to change out the front and see how it runs and then if needed change out the back.
Any opinions?
My main question at this point that I can't find a whole lot of opinions on:
Do I absolutely need to change both the front and rear?
My plan is to change out the front and see how it runs and then if needed change out the back.
Any opinions?