Modern car dashboards come with lights that indicate when a problem has occurred, but they don't give specifics. The check engine light is a standard dashboard signal that could mean there's a minor or severe problem. To determine whether you need to go to an auto mechanic for a tune-up, consider these common culprits.

Why Your Check Engine Light Is On

1. Catalytic Converter

A catalytic converter connects to a vehicle's exhaust system and turns carbon monoxide generated from the combustion process into carbon dioxide. Through regular maintenance, this part will stay in working order, although it can get clogged during harsh weather. Pay attention to the smoke that comes from your exhaust, because black or grey smoke could indicate a problem. Also, be aware of sputtering or coughing sounds, which could signal a clog higher up the catalytic converter.

2. Gas Cap

A typical reason for your check engine light turning on is from a loose gas cap. The cap is an essential component of the car's fuel delivery system, as it stops gasoline fumes from leaving the tank. When the light turns on immediately after a trip to the gas station, pull over and ensure the cap isn't loose or open. If it's broken or lost, an auto mechanic will repair the problem.

3. O2 Sensor

Your car's O2 sensor determines how much unburnt oxygen is in the vehicle's exhaust system. It reads the data and regulates the fuel and air that enters the engine cylinders, so your cabin stays fresher. An engine will continue to run even with a broken sensor, but it'll burn more fuel than usual. A bad O2 sensor could also damage other components, and it may fail an emissions test. If you notice you're spending more money on gas, take your vehicle in for maintenance.

At H & S Tire & Auto Center, you can ensure they’ll diagnose and repair the problem quickly. Serving Wentzville, Lake St. Louis, and the surrounding areas of Missouri since 1977, their auto mechanics are known to value their customer relations, personalized services, honesty, and integrity. Visit their website for more information on their services, or call (636) 327-5225 to schedule an appointment.