Engine Performance problem
2005 Ford Escape 6 cyl Front Wheel Drive Automatic 83000 miles
the engine light is on and they said it was the 02 sensor and so we replaced it, but the check engine light cam back on! What should we do? How many sensors are on my truck and where are they located? We only repleced one do you think we replaced the wrong one? Also I hear a noise when I hit bumps under the hood on the driver side- its like something is betting or knocking on the hood of the truck, but its under the hood? Please help!