2nd MOT failure post today! Done some searchin about but agai couldnt find an answer....

I've just noticed too that the LAMBDA reading on my emissions sheet is high:

1st test (1.03 limit) was 1.134
2nd test 1.209.

My questions are:

1. does the exhaust (cats) alter this reading?
2. Will a high LAMBDA reading fail the test (i assume so)
3. If the LAMBDA readng is high does it increase emissions?
4. Exactly where is the sensor?
5. What does LAMBDA mean?

TIA

 

Found this on http://www.aew69.dial.pipex.com/Exhaust%20Emissions.html

If your vehicle only fails the Lambda past of the catalyser test it is not the Lambda sensor it is far more likely to be a leak in the exhaust system. The Lambda sensor is more likely to cause a high CO and HC reading because when it becomes defective it gives a signal to the ECU to give more fuel as if the engine is still on choke.

So ill double check all the joints while im putting the centre section back in!

 

I was about to say exactly that..

Mine had a high Lambda reading and it was traced to a leak.. nice MOT bloke got hit son to wrap a towel around the leak and it passed

What a good sport!

Goodluck mate..

JGM