Who do i need to on used car laws ?

These are tough cases, especially if it is a really cheap used vehicle with high mileage. You have to prove that you were deceived. If it's an old, cheap used car then most reasonable people would agree that a lot of things could go wrong rather quickly. What were you promised that you did not get?

How many miles before the check engine light came on? It sounds as though the lights were just re-set by the dealership so they were not on at the time of sale, then came back on. Was the car not inspected prior to selling it to you? Did it have a valid sticker at the time of sale? What is the year, make and model? As my colleague here has said, if it was an old car with high mileage, problems are expected. If it was newer, then judges and juries have an easier time finding sympathy. Without more information, I can't say if you have any possible legal claims or not. I would suggest you gather all your documents and even write some notes on your conversations with the dealer where you asked to return the car, and then contact a consumer attorney. You can look here on or on National Association of Consumer Attorneys.