Posted on 7/16/2025
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There’s nothing more frustrating than seeing your check engine light suddenly pop on while you’re driving around Kansas City. That little glowing light can mean anything from a loose gas cap to a serious engine issue. So, how do you know if it’s something you can fix yourself or if you should head straight to a trusted mechanic? At Bret’s Autoworks, we help drivers figure that out every day. Here’s what you should know when your check engine light comes on — and what steps to take next. Common Reasons Your Check Engine Light Comes On1. Loose or Damaged Gas Cap A loose, cracked, or missing gas cap is one of the most common reasons the check engine light comes on. It disrupts the fuel system pressure, which triggers the warning. 2. Faulty Oxygen Sensor Your oxygen sensor monitors the air-to-fuel mix in your engine. When it malfunctions, it can reduce g ... read more