Important! : MOT Failure - Exhaust Emissions??

1. tisandy Regular Poster Joined: Nov 2010 Posts: 349 2000 Mk2 Saxo VTR, 1997 Mk1 Saxo.

   #1 10th May 2011, 18:37

   Got these failures:
   
   1) Exhaust emissions carbon monoxide content at idle excessive.
   
   2) Exhaust emissions Lamda reading after 2nd fast idle outside specified limits.
   
   What does this mean?
   
   And what seams to be the problem?
2. tisandy Regular Poster Joined: Nov 2010 Posts: 349 2000 Mk2 Saxo VTR, 1997 Mk1 Saxo.

   #2 11th May 2011, 15:42

   Bumppp.
3. JDub Established Member Joined: Oct 2010 Isle of Wight Posts: 1250 Saxo '99 1.1

   #3 11th May 2011, 15:49

   Sounds like possibly the lambda sensor or the cat.
4. 0_sax-magnet_0 Infrequent Poster Joined: Feb 2009 South Wales Posts: 101

   #4 11th May 2011, 16:19

   Quote:

   Originally Posted by JDub Sounds like possibly the lambda sensor or the cat.

   I agree
5. shaneio Established Member Joined: Nov 2008 welwyn garden city, hertfordshire Posts: 2313 s1 106 xsi

   #5 11th May 2011, 16:20

   the 2nd fast idle is simple enough to sort by takin the lambda out and cleaning it up, failing that it will be a new lambda. as for the excessive carbon monoxide that sounds like your cats gone
6. SunderZ Established Member Joined: Sep 2005 Guiseley, Leeds Posts: 1064 Vts turbo, 1.1 dsire, Pug 207.

   #6 11th May 2011, 20:51

   the Lambda reading relates to the amount of oxygen in the exhaust gasses i think..(sounds like the same problem i had a few year ago) if your exhaust is leaking it can suck in fresh air as the gasses pass through and this increases the 02 levels. my issue was i had a dual exit exhaust so had to make a planking plate to direct gasses out of one side as air "could" be drawn through as well as a few leaks down the system too.