Close
QUESTIONS

RepairPal is your advocate for car care advice and guidance

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

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
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.
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
Get a Repair Estimate
Guaranteed by certified locations nationwide. Learn more
RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
Just start the engine prior to removal and let .it heat up. Worked for me, you just have to beware of the fact that this also heats up everything else. I've also found that if I put baking soda in boiling water and dip the ends of the sensors in it, sprinkling them with it also for a minute or two, would clearup problems that made your check engine light come on. I,ve cleared the codes on 3 cars, done this, and havin't had the codes or problems come back.
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.
Impact vibration on the wrench flats if reachable and nothing works better than PB Blaster for stuff like this.....
Didn't find what you were looking for?