So I just bought this 09 Civix EX sedan for only $500 and it’s mechanically perfect. I had my mechanic inspect it with his snapon OB2 tool and he said it’s in great shape. Only light on is something about the evap system nbd. Only thing that is slightly annoying is that my odometer doesn’t work while I’m driving but when I crank it up it will flash the mileage then the service light will only stay at 1235 and the odometer says -9999 and flashes. Any clue what this is and the fix for it?