1995 Jeep Grand Cherokee Limited, with V-8 engine (California emissions).
I believe the O2 sensor is on the exhaust manifold. Can I change this out without having to lift the car off the ground? How difficult is this job? Thank you
How difficult to replace a oxygen sensor?
It's probably tall enough that you can reach it from under without lifting, depending if it's even accessible. There are more than likely two, one on each manifold (after where the four tubes meet into one larger). Depending on age and whether or not it was anti-seized on the install, it can be a GIANT pain to get them out. Since you're replacing, don't waste money on a special socket that lets you keep the wire intact. My advice is to destroy the outer case of the sensor so you can get a normal socket on the nut portion. Don't try with an open-end wrench, you'll just round the crap out of it. Try initial removal with hot exhaust. No luck? Try it cold (ambient temp). Still not budging? Use a large propane canister and heat the crap out of it, then quickly try to remove. Super-heating the threads helps break the strong bonds they've developed in twenty years of hanging out in the manifold. I had an old fiat that was so bonded it actually tore out the bung instead of loosening at the threads. Anyway, good luck, and use a breaker bar and six point socket.
How difficult to replace a oxygen sensor?
It is very easy to do, it will take a 7/8 open wrench, on some vehicle it will take a 1/2 inch wrench. The oxygen sensor is located on the exhause before and after the cat converter. Use some antiseze when installing it on the threads and besure to disconnect the neg post on the battery, God Bless,
i have same vicle and had 2 replace my oxygen sensor 2.
not difficult let vehicle cool of do not have 2 jack up however there may b 2
1 in front of catalytic converter 1 behind disconnect battery first very important
disconnect oxygen sensor wire connection then take wrench an turn it off it is on exhaust under vehicle
