That is only the starting point! first do all the basic tune up items and see if you can isolate any other items that are defective, If you are the one doing the work you need a digital meter with duty cycle,do a search on fuel pressure and EHA. plus Potentiometer,after you check those you may also need to see if you have troubles in the cat,(being restricted) But I feel that after you replace the Oxygen sensor,reset the fuel mixture and do the Lamda check you may be fine.