02 sensors are 100,000 mile parts and play a major role in fuel economy, have them checked with a scantool. Also mass airflow sensor, ect(engine temp. Sensor) we need to figure out if the pcm is switching to open. Loop operation.
April, 17, 2012 AT 2:46 PM
Are you sure that is correct? That converts to about 8MPG and that is really extreme. You likely have a check engine light coming on so you need to have to codes read and go from there.