Why Is My Check Engine Light On?


You’re driving on the road and minding your own when you look down and see it – the check engine light. Even though there isn’t a noise or smell triggered by your check engine light, it is a symbol that is hard to miss. This light is feared by many motorists because it can mean so many different things. Some of the problems it indicates are more serious than others, which is why you should immediately seek out a diagnostics scan. Here are the most common reasons why your check engine light may be on.


Loose or Damaged Gas Cap

After filling up at the gas station, you should always remember to tighten the gas lid until you hear the click. The gas lid prevents harmful pollutants from getting into the tank and keeps your fuel from evaporating. When the CEL comes on, the first place you should check is the gas cap. If retightening doesn’t reset the light, check for signs of damage. If you don’t find anything, you should move on to get a scan.

Faulty Oxygen Sensor

The oxygen sensor is an integral part of the exhaust system and is in charge of monitoring the amount of unburned oxygen present. If it miscalculates, it can cause a number of problems, including poor fuel mileage or misfires. 

Broken Mass Air Flow Sensor

The MAF measures how much air is being led into the engine to make sure to keep the right balance of air and fuel in the combustion chamber. The mass air flow sensor can get dirty or clogged, which will cause it to malfunction. When this device stops working, your check engine light will come on.

Clogged Catalytic Converter

The catalytic converter plays a key role in converting dangerous engine fumes into safer emissions. Typically, a faulty catalytic converter is caused by other failures. This problem requires expertise and a thorough inspection.

Worn Spark Plugs

Aging spark plugs are one of the most common culprits behind illuminated check engine lights. The spark plug is the component responsible for providing the spark to burn the fuel and air mixture within the combustion chamber. They can corrode and fail. If you haven’t replaced your vehicle’s spark plugs in a while, this could be the reason why your CEL is on. 

If you are looking for check engine light diagnostics and repairs in Mason, OH, turn to the experts at Prestige Auto Repair for help. We are known for being able to identify the most challenging check engine light problems. There are no repairs that are too small or too big for our team.

4152 Mason Pointe Dr, STE B Mason, OH 45040 (513) 486-1615
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