Posted on 2/3/2025
Why Does My Check Engine Light Come On? The check engine light is one of the most misunderstood warning indicators in a vehicle. It can illuminate for countless reasons, some minor and others severe. If you've ever found yourself wondering, "Why is my check engine light on?" you're not alone. Let’s break down the possible causes, symptoms, and the best course of action when this light appears on your dashboard. Common Reasons Your Check Engine Light Is On Your vehicle is an intricate machine with numerous components working together to ensure smooth operation. When one of these components fails or operates outside normal parameters, the onboard computer (ECU) detects the issue and triggers the check engine light. Below are some of the most common reasons for a check engine light: 1. Faulty Oxygen Sensor The oxygen sensor (O2 sensor) monitors the amount of unburned oxygen in the exhaust. A failing O2 sensor can cause your car to burn more fuel than necessary ... read more