My Brava has failed its MOY due to high lambda reading,
eng speed 2789 pass
co 0.000 pass
hc 15 PPM pass
lambda 1039 fail.
(see previous posts)

Ive checked the exhaust for leaks (new one fitted prior to re-test) , found one but still the same. Ive asked them to fit a new lambda sensor cos Im clutching at straws.

If this doent work Im really struggling.
Anyone know of someone who could diagnose this in Bristol or Gloucester?

Fish

I'd change the lambda sensor. They don't last forever. You've done everything else so for £30 it's not worth messing about

Here's the official splurge on lambda readings. Summed up in the last line

Basic fault finding for advanced emission test failures:

If a vehicle fails for high CO at idle and /or fast idle then.... if Lambda is too low, the mixture is too rich. This can be caused either by a misfire or by a faulty Lambda sensor. If it's running very rich, the 02 and HC will be higher than normal.
if it has a high Lambda and high 02 (0.5 to 1.5%), the "CAT" could be faulty. Before condemning it make sure its hot enough to work, the Lambda and other sensors are working OK and the exhaust downpipe hasn't got any leaks.
if the vehicle fails for high HC then ...if the CO passes, the vehicle is probably misfiring. Or if the CO fails and the Lambda reading is too low, the mixture is probably too rich and it may also be misfiring.
if the CO fails, the Lambda reading is high and the O2 reading is high (0.5 to 1.5%) the "CAT" could be faulty. Again check out the simple measures above before condemning it.
if the Lambda fails then...if its too high the Lambda sensor may be faulty, the mixture may be too weak or there may be a hole in the exhaust downpipe. If Lambda is too low the sensor may be faulty, the mixture may be rich or the vehicle may be misfiring.

buy online here http://www.buypartsby.co.uk/lambda_sensors.php

Oh well still the same , time to throw more money down the drain. Surely there are garages in the glos/ bristol area who can diagnose this?

I am asking the garage to check thoroughly for exhaust leaks, and the grounding of the sensor. Cant get time off work.

Andy