Hyundai Repair: car problem, hyundai accent, oxygens


Question
Hi my name is Soren.
My car is a hyundai accent gl 2002.
this my problem:
the light of "check engine" turn on permanently,
beside this everything looks fine,but a few days
ago the car start to shake when I use the brake and also when is place in parking.
The manual say that light turn on when something happen in the exhaust system,thats truth?
I dont have the money to take the car to the shop right now.but can you help me with few advices to do it myself...
              thanx


Answer
well 1st if the car still under warrinty, you shouldn't have to pay anything. Have you checked the oil or water? And another thing is your sinsors some of them might be gone out. But if I was you I would have it checked out. Yes that could be true. I almost would bet that the oxygens is gone out. You would Have two of them. But if it calls for three change all there.
                                Thank you,
                                    John