removing air/fuel sensor
Thread Starter
Pole Position
Joined: Feb 2011
Posts: 202
Likes: 2
From: wi
removing air/fuel sensor
Hi all, My check engine light is on, and it is about air/fuel sensor. I am trying to remove the old a/f sensor, but it is too tight. I am even not sure if I wrench the right place. Could you help me to check, if I should wrench the red place, or blue place? Is there any way to save some energy? Thanks
Instructor
Joined: Oct 2005
Posts: 1,090
Likes: 129
From: pa
Hi all, My check engine light is on, and it is about air/fuel sensor. I am trying to remove the old a/f sensor, but it is too tight. I am even not sure if I wrench the right place. Could you help me to check, if I should wrench the red place, or blue place? Is there any way to save some energy? Thanks
CL Community Team
Joined: Apr 2001
Posts: 16,533
Likes: 1,379
From: Austin, TX
I hope you have the new sensor at hand. Examine it and you will know which face(s) the wrench should fit. I prefer a box wrench as the connector can pass through. For bank1 sensor which is accessed from below, an offset box wrench is needed. For the one you are trying to reach a standard box wrench should work.
Soak it and let it sit. Soak it again and then apply force. Once you budge it, remember 1/8 forward 1/16 back, 1/4 forward, 1/8 back, 1/2 forward, 1/4 back and so on. Shoot some more pb once the threads expose.
Salim
PS: I would highly recommend buying a OEM sensor.
Soak it and let it sit. Soak it again and then apply force. Once you budge it, remember 1/8 forward 1/16 back, 1/4 forward, 1/8 back, 1/2 forward, 1/4 back and so on. Shoot some more pb once the threads expose.
Salim
PS: I would highly recommend buying a OEM sensor.
Last edited by salimshah; Nov 10, 2015 at 04:19 PM.
Racer
Joined: Nov 2009
Posts: 1,567
Likes: 87
From: NJ
A little heat sometimes helps the pb blaster along. Spray it (area between the red and the manifold), then let warm the car up to temp with a quick drive around the block and spray again. A big long handle 22mm box wrench comes handy too, if you don't have access to a good 6 pt 22mm deep socket and breaker bar. Slip a pipe or jack handle over the wrench if you need extra leverage to break it loose.
Pole Position
Joined: Jul 2014
Posts: 306
Likes: 13
From: FL
If you have to ask where to put the wrench, you should take it to a professional. My advise.. once you figure out there's no where to put a wrench on the blue area.. if it starts coming out hard, take it somewhere. The sensor is seized and you'll end up tapping the manifold. I've done it a bunch of times.
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