Seeing the check engine light illuminate on your dashboard can be concerning, as it signals that something is wrong with your vehicle. While some issues may be minor, others require immediate attention to prevent further damage. At Integrity Auto Care, we provide expert check engine light diagnostics and repair in the greater South Beloit, IL area. Here are five common causes of an illuminated check engine light.

Faulty Oxygen Sensor

Oxygen sensors monitor the level of unburned oxygen and help regulate the air-fuel mixture for optimal combustion. Over time, this sensor can become dirty or fail, causing incorrect readings that affect fuel-efficiency and emissions. A faulty oxygen sensor can lead to poor gas mileage and increased emissions, so replacing it promptly is important.

Malfunctioning Mass Airflow Sensor

The mass airflow (MAF) sensor measures the amount of air entering the engine to ensure the proper air-to-fuel ratio. If the sensor is dirty or fails, the engine may receive too much or too little fuel, leading to rough idling, reduced power, and poor fuel-economy. A malfunctioning MAF sensor can cause the check engine light to turn on, and replacing it can restore proper engine function and efficiency.

Failing Catalytic Converter

The catalytic converter plays a critical role in reducing harmful emissions by converting toxic gases into less harmful compounds. If it becomes clogged or fails, your vehicle’s performance may suffer, and emissions will increase. A failing catalytic converter can lead to reduced acceleration and poor fuel-economy. Replacing a damaged catalytic converter is necessary to maintain proper engine function and meet emissions standards.

Bad Spark Plugs or Ignition Coils

Spark plugs and ignition coils are responsible for igniting the air-fuel mixture in the engine’s cylinders. When they wear out or fail, misfires can occur, leading to reduced power, rough idling, and difficulty starting the engine. A check engine light caused by faulty spark plugs or ignition coils should be addressed quickly.

Loose or Faulty Gas Cap

One of the simplest reasons your check engine light might come on is a loose or damaged gas cap. The gas cap seals the fuel system If it’s not properly tightened, fuel may evaporate before you get the chance to run on it.

Check Engine Light Repair in South Beloit, IL

When you need check engine light repair in South Beloit and the surrounding area, contact Integrity Auto Care at (815) 957-4159. Feel free to give us a call to schedule an appointment!