Jump to content

Lambda value first too high and then too low

Recommended Posts

Hello everyone!
I have been a proud owner of a 2006 Citroen C1 for over a year now, but lately I have had some issues with it. The lambda value was very high, up to 1,5. After plugging up a leak I found in the exhaust system with some paste it went down to 1,05. I could hear that my temporary fix started leaking again, and plugged it up with paste and muffler tape.

When doing a check-up the lambda value had gone down to 0,95 instead, and the CO value while idling had gone up really high although this was not an issue before.

I am at a loss at what the issue could be, if anyone have any suggestions I would appreciate it very much!

Link to post
Share on other sites

There are 2 lambda sensors, one before and one after the exhaust catalytic converter. Are your values for the one before ? The one before should switch frequently around 1.0 as it adjusts the fuel and the one after should stay the same if the cat is working.

A high CO value suggests a rich fuel/air mixture, you could check if the air filter needs replacing.

This link explains some things which are worth a look https://www.austincc.edu/wkibbe/lambda.htm

Link to post
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.

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.

  • Create New...