Just bought a high mileage Accord (201k) and tried to get emissions here in Atlanta...

The car runs great, idles good, no CEL...

Here are the readouts:

25/25 Test
HC ppm -- Passed
Reading -- 30
Allowed -- 132

CO % -- Fail
Reading -- 1.24
Allowed -- 0.73

NO ppm -- Pass
Reading -- 187
Allowed -- 945

RPM
Reading -- 1828
Allowed -- 3000 (max)

CO +CO %
Reading -- 15.6
Allowed -- 6.0 (Min)

Pretty much the same results for the 50/15 test...

Maybe just a dirty air filter and oil change needed (hoping)?

Anyone have any advice on easy things to check myself before taking it to a mechanic...?