What are the work tactics to change the o2 oxygen sensor meaning can i be able to get to it if i jack up the car, and also how many is on it?

Unfortunately there is more diagnosis required. *Hands-on* testing to ‘prove’ the sensor is actually the problem or it is just doing it’s job by telling the computer there is a problem detected within the operating system. I suppose you could replace the sensor and hope that fixes it. Special tools are required to do the install.