honda catalytic converter
 

My engine light has been on for months. I have taken the car in several times.
Honda has fixed things several times. The light always comes back on after a
day or couple of hours. My 2000 Honda Ody. is at the shop again now they say
it is the catalytic converter. Actually they have told me that it could be
that from the start, but because of cost we tried some other things it might
be. Anyway, my question is what happens to my car if it is not fixed. Cars
did not use to have them. I know it is for pollution control. But does it
have any effect on the car its self?