How to remove an oxygen sensor that just won't move.
1990 Ford Ranger

How to remove an oxygen sensor that just won't move.

(1990 Ford Ranger)
The sensor seems to have only surface rust on it but no matter how much pressure I put on the wrench it just won't turn.I've sprayed liquid wrench but that doesn't help.
1 answer & 0 comments
Popular Answer
on February 19, 2009
Sometimes these things won't cooperate. The first thing I do is to take a torch and heat up the sensor red hot, and let it cool by itself. This will tend to shrink the O2 and it may work loose. Sometimes a 6 point socket with a long breaker bar on it will help get it moving. In extreme cases I have had to replace the exhaust part that the O2 was in because it refused to move.
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General Diagnosis
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on February 19, 2009
Sometimes these things won't cooperate. The first thing I do is to take a torch and heat up the sensor red hot, and let it cool by itself. This will tend to shrink the O2 and it may work loose. Sometimes a 6 point socket with a long breaker bar on it will help get it moving. In extreme cases I have had to replace the exhaust part that the O2 was in because it refused to move.
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