I KNOW ITS LOOKS LIKE ALOT TO READ BUT PLZ DO. ID APREACIATE IT. i have a 98 ford f150 4.6 and it keeps saying i need to replace the o2 sensor which i have already but it keep popping up. im thinking the problem is something els and its just making the computer TRIP. whatever it is its getting worse because my truck is not getting as much power as it use to and when i take off its rough.