Mot fail

[Xsikid]

Good afternoon well the xsi went in for mot today and failed on the emissions. On second fast idle test the co is 0.56 and lambda is 1.090. But gutted but Iv put fresh oil and filter in and some redex in the tank. It's a fairly recent lambda sensor so hope it will go through this time!!! Had map sensor the other week too . Iv cleaned out breather hoses , tb and stepper motor any ideas what I could have missed?