5 Reasons Why Your Check Engine Light is On

Biggers Mitsubishi Check Engine Light

Few things in life are as cryptic as the dreaded “check engine light,” the glowing warning sign that pops up on our vehicle’s dashboard and could be any number of terrifying ailments – or just an issue with the car’s computer. Here are a few reasons why your car may be displaying its check engine light.

Oxygen Sensor

Your engine will use extra fuel and potentially damage your catalytic converter and spark plugs if you don’t replace a faulty O2 sensor, which measures the oxygen in your vehicle’s exhaust system.

Mass Airflow Sensor

This sensor measures the amount of air entering the engine and determines how much fuel to use. If this needs to be replaced, it could damage the oxygen sensor and catalytic converter.

Catalytic Converter

A malfunctioning catalytic converter can cause the check engine light to come on. Usually caused by neglected maintenance, damage to your catalytic converter results in more carbon monoxide emissions and poor fuel economy.

Spark Plugs

Your spark plugs may need to be replaced, or there could be an issue with your plug wires. This can cause reduced performance or clog your catalytic converter.

Gas Cap

If broken, missing, or loose, the check engine light may come on for a simple gas cap.

These are the top five most common reasons why your check engine light may flip on. Thankfully, most of them are an easy fix. If you need help servicing your vehicle, stop by Biggers Mitsubishi.

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