Which is worse a blinking check engine light or a solid on check engine light?
* A flashing light indicates a problem that is currently happening and may require immediate attention, whereas a steady light can be diagnosed at the first convenient opportunity.
* A technician connects a “scan tool” to your car’s onboard diagnostic system to determine the problem.
* Further testing and diagnostics may be required to pinpoint the exact cause of the problem.
* Once the problem is pinpointed, repairs are made and the light is reset.