Car Engine Check Repair Service
When the electronic-control system finds a problem it cannot adjust, the computer turns on a yellow warning indicator and stores a trouble code in it's memory. These diagnostic trouble codes (DTC) help identify the probable source of the problem, such as a malfunctioning sensor or a misfiring engine and can be read with a scan tool or diagnostic computer. Vehicle manufacturers originally used the OBD system to help technicians pinpoint and troubleshoot malfunctions. Exactly what the OBD system looks for depends on the make, model and year of the vehicle.
Although you'll probably have to take your car to the shop to get the exact answer, there are a few things you can do immediately after seeing the "service engine soon" light turn on for the first time.
Check your gas cap
A missing or faulty gas cap can turn a check engine light on. The pressure inside your gas tank is thrown off-kilter when the gas cap is off or not secured properly. To your car's on-board diagnostic system, or OBD system, a change in pressure could indicate a leak in the emissions system, so the light is triggered to alert you to the problem. Replace the missing cap or tighten the existing one to see if the problem goes away. Give it at least a week. If the light stays on, head to the repair shop or dealership.
Check under the hood
Open the hood and look for leaking hoses and frayed wires. Take an especially close look at the spark plug wires. If they are cracked or otherwise showing signs of serious wear and tear, your spark plugs may be misfiring.
Reduce speed and load
If the check engine light is blinking or you notice any serious performance problems, such as a loss of power, reduce your speed and try to reduce the load on the engine. For example, it would be a good idea to stop towing a trailer. Have the car checked as soon as possible to prevent expensive damage.
Have the code read and the problem fixed
Take the vehicle to a professional. Some automotive parts stores will read and interpret the code for you. However, unless there is an easy solution to the problem, you should have the vehicle diagnosed by our qualified service technician directly to tell what's wrong.