fjuman

Ok so last post I said that my car had bad milage and many said it was the 02 sensor. Should i replace both? Cause i was told there is one on the header/manifold and another in the back. Also how exactly does the 02 sensor affect the gas milage?...and can the 02 sensor be bad and the engine check light not come on and nothing show up when the mechanic runs through the computer check?

Deemeetree

You DO NOT need to make a new thread for a new question. Just add it to your already existing thread.

Yes, replace both.

fjuman

oh i just found out my car only carries the FRONT 02 sensor not the rear and it also turns out it might not be my 02 sensor causing the poor gas milage...its the DC Sports header. The connection piece for the sensor is located too high up on the header so the 02 sensor only reads from one pipe and not 2....which is what is supposed to happen with the stock honda header. Turns out my mixture was way to rich.