On my Mazda Tribute I get a reading for EGR command 10.2% and EGR error -62.5%. I do at least one CAT bad, been getting P0430. Have cleaned CAT with seafoam as recommended by a mechanic to try it out. I am not getting error code as often now, have cleared the code. In the emissions test CAT test completes, but evaporation says incomplete. I am don know what the two EGR readings mean, can someone help please. Thank you