Your car’s "check engine" or “service engine soon” warning light comes on when a problem is detected that causes excessive emissions. While many problems can illuminate the light, there are only three basic courses of action depending on the behavior of the light.

If the light turns on and off occasionally, there is an intermittent problem. No immediate action is necessary, although you may want to have your repair provider take a closer look the next time you take the car in for routine maintenance.

If the light comes on and stays on, there is a continuous problem that may also cause drivability issues and/or reduced fuel economy. Make sure the gas cap is tightly sealed; if the light goes out after a few days that was the problem. If the light remains on, schedule an appointment to take the car to your repair provider for diagnosis.

If the light flashes rapidly, there is a potentially serious problem that requires immediate attention to prevent costly catalytic converter damage. To the extent possible, reduce vehicle speed and load, and head for a repair facility. If the light continues to flash for more than a minute or so, shut off the engine and have the car towed to a shop for troubleshooting.

Find a AAA Approved Auto Repair shop near you to have your check engine light checked out.

AAA Approved Auto Repair