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I am getting code p0161 drivers side downstream o2 sensor. (i have mil eliminators but anyways) i decided to change the sensor. 7/8 socket made for an o2 sensor and I ended up destroying the "bolt". any ideas?
If you can't get a wrench around it use some vise grips. Soak it in PB blaster / WD-40 for a bit before trying to get it out as those guys have a tendancy to rust like crazy and be difficult to get out.
you can also take a torch ( if you have one) and heat up the pipe around the O2 bung to get it to release. Just dont heat up the pipe to close or the sensor will get to hot before the pipe does.