Their is a fault with the electronics on one of the vehicles electrical circuits, or one of the sensors is activated and reading a mechanical fault. This will bring up the malfunction indicator light, you will need to see a dealer with an electronics reader to find out what this fault code is meaning. Some dealers will read it for free, and then charge for the repair from that point. If it was a false code they will also reset it for free, althogh i have heard some dealers can charge up to $100. OR you can even hire a fault code reader from an automotive parts store and read it yourself. If it is an orange light, just get it to a dealer when you are able to. If it is a red light, avoid driving it and get to a dealer ASAP. this will prevent any further possible electrical damage and any other mechanical damage from what ever the fault maybe. Also, their is a safety issue if the fault is relating to a safety feature of the car. It is hard to pin point an exact fault and exact cost. Cost will vary with the type of fault. Once repaired, the dealer will be able to reset the light for you. Goodluck