Cat oxygen sensor appearance?
03-16-2017, 04:17 PM
#1
Thread Starter
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!
03-16-2017, 05:48 PM
#3
Moderator
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; 03-16-2017 at 06:24 PM.
03-17-2017, 07:13 PM
#4
Thread Starter
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.
Thread
Thread Starter
Forum
Replies
Last Post