How to replace a Oxygen Sensor on a 1998 4x4 Ranger?
 

My check engine light is always on and when i got it checked out they said that it was a oxygen sensor. How do i replace this step by step?

Thanks

Which O2 sensor did they say it was

If the one on the exhaust manifold it is just like removing a bolt un-thread it from manifold and replace with new one

I hope your truck is body lifted! LOLOLOLOLOL upper 02 sensors are so tight to the body. even with body lifts its still a pain in the ass already did both of mine

Haven't had to do one yet but if you google it, more then likely you'll get a few different queries.