Weird thing happening, My 04 runs great just passed emissions, there is a service light on, showing 02 code, replaced it, code still on. until a couple of days ago was getting decent gas mileage, changed the gas cap and air filter and battery, now its eating gas like its free.. I can litterally watch the gauge move when driving to work which is about 15 miles from my house..

Since it is still running good its kind of confusing as to what can be causing this..

Any thoughts?

Thanks all,

 

If the O2 code is still on prolly still the O2