O2 sensor issue

[Tyler M]

I've been trying to replace the O2 sensor on my 90' Ranger but the darn thing just does not want to come off. I've tried an open-end wrench and O2 sensor socket with liquid wrench and the exhaust warm but nothing works. Any suggestions would be greatly appreciated.

 

[Z3CHYD]

Best i can say is get some PB Blaster and spray the piss outta it, let it soak for a couple hours and try it again. I had to use pb blaster and an inpact wrench on my o2 sensor on my 86 ranger