I have brought my car into the mechanics about five times for an o2 sensor. It threw a code for a right bank lean. They put in a new o2 sensor the check engine light came back on. I have been thru this process several times with the same code and problem. The mechanic recently even motorvac the car. The check engine light came back on again. I don't know what to do next. I really don't want to go to Ford and get charged an arm and a leg. Thank You
