Check Engine Light

It is never easy to understand what might be causing the check engine light to come on. The only thing that you can say for sure until the vehicle is diagnosed with a scan tool or code reader is that the OBD2 system has detected a fault that may cause the vehicle’s emissions to increase.

For more technical information on this subject, see the following pages:
http://www.aa1car.com/library/mil.htm

http://www.aa1car.com/obd2help/

http://www.aa1car.com/library/2003/cm70336.htm

http://www.aa1car.com/library/warning_lights.htm