How do you remove a frozen oxygen sensor? I've tried WD40, PB Blaster, heat, 22mm sockets with extensions, pipe wrench, O2 socket - it won't budge. What's left to do??
by Visitor in Encinitas, CA on April 19, 2010
I had to replace the O2 sensor, bank 1sensor 1(before the cat, next to exhaust manifold near the firewall), on my 2000 toyota avalon. I had a tough time getting the original out(125k on engine) and almost gave up until a mechanic took the O2 socket on the sensor without a rachet or extension. He took 3 foot long steel pry bar and put the end into )O2 socket that he placed on the sensor and was able to snap it loose. As for having yours already replaced, it should have come with some anti-sieze compound on it. If it didn't there's more of a risk of being frozen. You can buy antiseizing , but ask your local shop that you are using it for 02 sensors because some anti-seizing compound can damagethe 02 sensors.
run the truck for about 5 minutes then break it loose, be carefull not to burn yourself. the heat from the exhaust will help expand and contract the metal. it worked on my 01 sequoia
For those seeing this (more than 2 &1/2 years after posted) , don't know if this is in 'repairpal' tips and tricks listing , but if your definitely replacing the O2 sensor , carefully snap the sensor and pull out the 'guts' and use a 6 point impact socket on what remains. Still may need extra leverage , but 6-point will hold it a lot better than the best specialty wrench out there , when they're siezed. The same holds true for brake lines , power steering etc. , if you know you're replacing it why worry about it when it comes to removing it?