my 98 civic hatch is throwing a cel code p0171(fuel too lean) and i think it is my primary o2 sensor.......i have a spare secondary(by the cat) o2 sensor layng around......my question is can i use the secondary o2 sensor in place of the primary one?......i have heard that they are different voltages but i am not sure......also, how do you clean an o2 sensor? carb cleaner?.....