NCT emissions FAIL :(

Hi lads amnd ladies

Failed NCT on low emissions, Lamda just Changed before test. Note she is idling a small bit rough so i thing my MAF could be in trouble but here are the results of the test.

TEST RESULTS

LOW IDLE CO 3.32VOL% ABOVE 0.5O% = FAIL
HC 182 PPM ABOVE 0 PPM = FAIL

HIGH IDLE Lambda 1.00 not between 0.97 and 1.03 = fail
CO 0.04 vol% 0.30% = fail
HC 28PPM above 200ppm = fail

Could it be my MAF or maybe my idle control valve? just wondering if anyine had similar results

i wish i understood all that!

but yes you could have a dodgy MAF, sorry I'm not being helpful

feel for you brother

New or used Lambda? Genuine Subaru?

lambda is not the problem...
dont think 0 ppm hc is right man...200 is maximum so just co on idle is problem!!!

would A faulty MAF cause this lads?