You rely on your dashboard lights to alert you when there’s an issue with your vehicle. Some lights, such as the tire pressure and oil signs, are clear. However, the check engine light might light up for a number of reasons. Below are a few of the most common causes for a check engine light turning on.

Why Is Your Check Engine Light On?

1. Loose Gas Cap

An unsecured gas cap is a common reason for a check engine light turning on. If you just filled up your tank at a gas station and notice the light is on after pulling away, this is likely because you didn’t properly turn the gas cap all the way. A loose gas cap results in leaked fuel vapors and reduces gas efficiency, which is why there is a system alert for this issue. 

2. Worn Spark Plugs

Spark plugs are a critical component of a combustible engine, as they transmit the electrical signal that allows the fuel to ignite. Along with the check engine light, if you notice that your engine has been making loud noises or you’ve been having difficulty accelerating, it could be that the spark plugs are nearing the end of their lifespan. 

3. Faulty Oxygen Sensor

An oxygen sensor is an essential part of your emissions system. It measures the amount of oxygen in your exhaust to determine the fuel efficiency of your vehicle. Like other components, it suffers wear over time. If your check engine light is on, this could mean that your oxygen sensor is no longer functioning and must be replaced. 

When it’s time to schedule auto diagnostic services for your vehicle, turn to the team at Mr. Transmission in Cincinnati, OH. For over 50 years, this premier auto shop has specialized in a variety of maintenance and repair services. They provide engine and transmission services for vehicles of all makes and models, including check engine light service. They are known for their exceptional customer service and honest pricing. Give them a call today at (513) 769-3111 to schedule an appointment or visit them online for more information about their services.