From minor issues to potentially major problems, the check engine light can illuminate for a variety of reasons. The important thing is that you promptly visit the shop for diagnostics so that the issue doesn’t get the chance to further escalate. At Prestige Automotive, we provide expert check engine light diagnostics and repair in the great Helena, MT area. Here’s a look at five common check engine light triggers.

Faulty Oxygen Sensor

The oxygen sensor plays a crucial role in monitoring the amount of oxygen in your vehicle's exhaust gasses. A malfunctioning oxygen sensor can lead to decreased fuel-efficiency and increased emissions. When this sensor fails, the check engine light often illuminates to alert you of the problem.

Catalytic Converter Issues

The catalytic converter is responsible for reducing harmful emissions by converting toxic gasses into less harmful substances. As the miles go by, the catalytic converter can become clogged or damaged, resulting in decreased engine performance and increased emissions. A faulty catalytic converter can trigger the check engine light and may require replacement to resolve the issue.

Faulty Mass Airflow Sensor

The mass airflow (MAF) sensor measures the amount of air entering the engine and plays a crucial role in determining the correct air-fuel mixture for combustion. A malfunctioning MAF sensor can lead to rough idling, decreased fuel-efficiency, and engine performance issues.

Ignition System Problems

Issues within the ignition system—such as faulty spark plugs, ignition coils, or spark plug wires—can trigger the check engine light. These components are essential for proper engine combustion, and when they fail, it can result in misfires, rough idling, and decreased performance.

Loose/Faulty Gas Cap

Something as simple as a loose or faulty gas cap will sometimes trigger the check engine light. A loose or damaged cap may allow fuel to evaporate before it is directed to your engine.

Engine Repair in Helena, MT

When you need auto repair in Helena, MT and the surrounding area, contact Prestige Automotive at (406) 442-2724. At our local auto shop, we can expertly handle your vehicle’s repair and maintenance needs. Feel free to give us a call today to make an appointment!