Audi A2 1.4 petrol. Very high emissions levels. Where to start?

rino87 · 01-02-2021 11:18PM #1

Hi - better half had her A2 in for NCT today. It flew thru everything bar the emissions which seem off the charts:

Low idle:
CO 1.47%
HC 79 PPM

High idle:
Lambda 0.95
CO 1.83%
HC 188

Engine was good and hot on the way in but was left waiting in a queue for 15-20 mins before test.
Car has seen regular, but short distance use since covid. 5-10km a day.

It's a lovely tidy little yoke with barely a mark on it, and its kept well so would like to attempt to sort this myself if i can, but don't know where to start so looking for advice please!

Atlantic Dawn · 01-02-2021 11:39PM

Were you sitting in the q with the engine running?

rino87 · 02-02-2021 12:05AM

Atlantic Dawn wrote: »

Were you sitting in the q with the engine running?

I wasn't there, but I wouldn't think so.

Atlantic Dawn · 02-02-2021 02:15PM

Have you got the figures from the fail sheet of the limits allowed? Think it's different for each car/year.

You might get away with driving it in high revs for a while if figures are near pass.

rino87 · 02-02-2021 02:51PM

Atlantic Dawn wrote: »

Have you got the figures from the fail sheet of the limits allowed? Think it's different for each car/year.

You might get away with driving it in high revs for a while if figures are near pass.

Low idle: Failing Limits:
CO 1.47% Above 0.30%
HC 79 PPM N/A

High idle:
Lambda 0.95 Not between 0.97 and 1.03
CO 1.83% Above 0.20%
HC 188 Above 200ppm - this was a pass

Edit - sorry that formatted weird when the post was published - the failing limits are on the right.

It's the carbon monoxide figures that look, on paper to my untrained mind, to be off the charts.

Audi A2 1.4 petrol. Very high emissions levels. Where to start?

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