Jump to content
Do Not Sell My Personal Information


  • Join Toyota Owners Club

    Join Europe's Largest Toyota Community! It's FREE!

     

     

Mot Failure - Exhaust Emissions High Lambda


treemite
 Share

Recommended Posts

Hi everyone, this is my first post on this forum.

Yesterday I took my 1996 MR2 in for MOT and it failed on "Exhaust emissions Lambda reading after 2nd fast idle outside specified limits".

The guy who did the MOT told me I had a minor leak at the catalyst joint and the guy at a different garage this morning told me I should get a new lambda sensor.

The readings were as follows -

Fast Idle test:

CO 0.38% (vs 0.3% limit)

HC 59ppm (vs 200ppm limit)

Lambda 1.13 (vs 0.97 to 1.03)

2nd Fast idle test

CO 0.11% (vs 0.3% limit)

HC 21ppm (vs 200ppm limit)

Lambda 1.16 (vs 0.97 to 1.03)

Natural idle test

CO 0.35% (vs 0.5% limit)

The question is - do I get the leak repaired (changing of gasket I think) or get a new Lambda sensor?

The new Lambda sensor is a bit pricey for me at the minute (quoted at £120 fitted) so I was hoping that fixing the leak would solve the emissions problem. Is this likely?

Any advice gratefully received!

Link to comment
Share on other sites


You fix the leak first, and it will most likely solve your issue. The system needs to be air tight, ANY blowing will affect the emmissions.

You are not far out at all on those figures, a duff lambda would most likely give much higher rate of failure than what you have at the moment...

Link to comment
Share on other sites

You fix the leak first, and it will most likely solve your issue. The system needs to be air tight, ANY blowing will affect the emmissions.

You are not far out at all on those figures, a duff lambda would most likely give much higher rate of failure than what you have at the moment...

Cheers. That's what I thought was the best course of action.

Link to comment
Share on other sites

Latest Deals

Toyota Official Store for genuine Toyota parts & accessories

Disclaimer: As the club is an eBay Partner, The club may be compensated if you make a purchase via eBay links

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