You will have to go get a scan done to read the set fault code, the light is an indication that there is a fault code set in the ECU, report that code back here for further assistance.
Mar 13, 2013 at 8:22 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.