Honda Car Forum

okay the car runs fine I'm getting about 28mpg its stick so kind rev up
a lot so that's where my gas goes. My emissions where
15mph CO2% 14.4 HC MAX 116 CO% MAX .71
NO MAX 794
O2% .21 AVE=31 CAR=97 AVE=.10 CAR=.34
AVE=237 CAR1194

25MPH CO% 14.48 HC MAX 91 CO% MAX .62
NO MAX 730
O2% .13 AVE=20 CAR=47 AVE=.09 CAR=.39
AVE=199 CAR=1025

so car failed both NO is it my cat or egr valve sytem anyone with help
please it would be appreciated!