When the check engine light illuminates, it's easy to feel anxious about what might be wrong. While the check engine light can signal a wide range of issues, some problems are more common than others. The important thing is to get to the shop before the issue gets the chance to significantly escalate. At Jimmy’s Top Tech Auto, we provide expert check engine light diagnostics and repair in the greater Austin, TX area. Here are five common reasons the check engine light might come on.

Oxygen Sensor Issues

Oxygen (O2) sensors monitor the level of unburned oxygen in your car’s exhaust. If the sensor malfunctions, it can throw off your engine’s air-to-fuel ratio, reducing fuel-efficiency and increasing emissions. A bad oxygen sensor is one of the most common culprits behind the check engine light. 

Faulty Spark Plugs or Ignition Coils

Spark plugs and ignition coils are responsible for igniting the air-fuel mixture in the engine. If your spark plugs are worn out or the ignition coils are failing, the engine may misfire, causing the check engine light to come on. 

Mass Air Flow Sensor Problems

The mass air flow (MAF) sensor measures the amount of air entering the engine to ensure the right amount of fuel is delivered. If the MAF sensor is dirty or faulty, the engine may receive too much or too little fuel, resulting in poor performance and triggering the check engine light. 

Loose/Damaged Gas Cap

A simple, often overlooked cause for the check engine light to illuminate is a loose or faulty gas cap. The gas cap seals the fuel system. If it isn’t properly secured, fuel may evaporate before it is directed to the engine for use.

Catalytic Converter Failure

The catalytic converter reduces harmful emissions by converting pollutants into less harmful substances. If it’s failing, not only will your check engine light come on, but you’ll likely notice a drop in performance. 

Check Engine Light Repair in Austin, TX

For auto repair in Austin and the surrounding area, contact Jimmy’s Top Tech Auto at (512) 768-2965. Feel free to give us a call to make an appointment!