Is there a code reader for a 91 3cyl?

Canadian car..I can't seem to locate a code reader..resonablly priced.. for a 91 3 cyl.Is there one?..Thanks!..

if you plug the fuse into the diagnostic spot the check engine light will blink out the codes and you can look them up online. the spot to plug it in is fuse box under dash. you will see one spot thats a little lower than the other fuses, plug a fuse in there and turn the key to the on position