Engine and Performance Signs

Your car’s engine is a complex system where dozens of components work together to deliver power, maintain fuel efficiency, and keep emissions in check. When something goes wrong, whether it’s a faulty sensor, a struggling catalytic converter, or low exhaust flow, your dashboard is the first place to look. The warning lights on this page are specifically tied to how your engine performs and how efficiently it runs, making them some of the most important symbols to understand.

From the Mass Airflow Sensor and Throttle Control warnings to the Catalytic Converter and DEF Exhaust Fluid alerts, each light signals a distinct issue that can affect your vehicle’s power output, fuel economy, or emission levels. Some of these warnings allow a short window to schedule a repair, while others, like the Reduced Engine Power Light may mean your car has already entered a protective mode to prevent further damage. Knowing what each symbol means helps you respond at the right time, avoid unnecessary repairs, and keep your engine running at its best.