Check engine light, read the code, O2 sensor drivers side. OK, no problem. Hmmm. Went and got a new sensor socket and a sensor. Now I'm ready. Crawl under the truck and unhook the connector, put the socket on, now for the ratchet. Ain't happening. Grab the flex head I found in the street a few years back. OK so far, Go to turn the sensor out and my cheeseball socket turns but the sensor just stayed there. Seems the socket opened up enough to get stuck . Darn thing won't come off either. finally got it off and figured some Deep Creep for awhile. Hosed it good, soaked overnite. Drove to work, hosed it again. Soaked all day. Tried again to get the sensor out, same darn thing. Tried some heat on the bung, maybe it will expand enough to let the sensor turn. Not. Decded to try some acetone/tranny fluid. Always worked before. Cheeseball socket does it again. Sooo, this morning I'm all about getting that stupid sensor out , 7/8" wrench,12 mm socket and ratchet, torch, and a pair of Vise grips as backup. Unhook the axle to the front diff, gives me a bit more room. Like me most of us aren't Stretch Armstrong. heat, tranny fluid mix, and the wrench and I got it to turn. YAY!! So to make a long story a little longer, it takes 3 days to change a O2 sensor. Just so you know. Anyways I'm feeling much better now.

 

Glad to here you got it out.

 

They can be a bit of a B!t@% to remove at times ....

 

BUT.... Did the code clear ? LOL

 

Well the code cleared but now I got a 0171 and a 1151. Stupid vacuum leaks. They suck. Have to poke around a bit today and see what I can find.

 

I have one on my '00 626 that won't come out. Judging from the non-changing voltage reading, I think it's dead. I figure when I have the exhaust out to replace the sway bar bushings (have to drop the subframe), I'll put the exhaust pipe in the bench vise where I can put some muscle into it.

The worst part of replacing any O2 sensor that I ever had, though, was getting to the connector on the back of the passenger side head of the 5.4 in my truck!