Cat oxygen sensor appearance?
Thread Starter
Joined: Mar 2001
Posts: 1,144
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From: Austin, Texas
Cat oxygen sensor appearance?
What should an oxygen sensor look like? I am chasing down a P0420 and pulled the o2 sensor out of the cat.
Note the appearance, no shield/cage and it looks like a layer was burned off.
Thx!
Note the appearance, no shield/cage and it looks like a layer was burned off.
Thx!
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Joined: Jul 2002
Posts: 22,384
Likes: 1,834
From: Long Island, New York
Even though the outer protective cage is missing, that o2 sensor is fine. If it wasn't, other codes would set. P420 is not related to a broken sensor cage.
Put a spark plug spacer on it and you're done. Not only will it cure your P420, it will protect the sensor element for life.
Adding a single spacer in the cat is a good proactive measure even on a car with no problems or codes, as the cat media breaking loose is extremely common. The spacer will protect it.
Put a spark plug spacer on it and you're done. Not only will it cure your P420, it will protect the sensor element for life.
Adding a single spacer in the cat is a good proactive measure even on a car with no problems or codes, as the cat media breaking loose is extremely common. The spacer will protect it.
Last edited by Billman250; Mar 16, 2017 at 06:24 PM.
Thread Starter
Joined: Mar 2001
Posts: 1,144
Likes: 1
From: Austin, Texas
I like that idea... this is a great solution. Question - these "o2 sensor extenders" - lots of choices are available. Are they all 18 x 1.5 threads?
And, yes, the old converter has had the catalyst break loose inside, it's moving around and causes a death rattle when idling.
And, yes, the old converter has had the catalyst break loose inside, it's moving around and causes a death rattle when idling.
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