Jump to content
Do Not Sell My Personal Information


Is my oxygen sensor failing? Forscan chart


fusionfan
 Share

Recommended Posts

I presume you'd start getting a fault code intermittently if it was failing.

 

I recently just had one replaced on my car and it failed completely and brought up a fault code.

 

That image looks like a perfect wave form to me :D

Link to comment
Share on other sites


On 23/06/2017 at 7:02 PM, fusionfan said:

Any thoughts?

Like Ian & James say, if it is upstream, then I think it looks ok.

The fuel/air mix in a petrol car is continuously varied between a little rich, and a little lean. This enables the cat to reduce the NOx (that means removing oxygen) when rich, and to oxidise CO & unburnt fuel (by adding oxygen), when lean. The design of the cat combined with this swing means it can do both jobs at the same time.

The downstream sensor should have a more stable signal, showing the cat has done its job.

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...

Forums


News


Membership