What does the "Check Engine" light indicate?

The "Check Engine" light is an important indicator on a vehicle's dashboard that alerts the driver to potential issues within the engine or the emissions control system. This light can illuminate for a variety of reasons, ranging from minor problems to more serious mechanical failures.

For instance, it may indicate issues such as a faulty oxygen sensor, a loose gas cap, or more severe problems, such as engine misfires or catalytic converter failures, all of which can affect the vehicle’s performance and emissions levels. The emissions control system is critical for meeting regulatory standards and ensuring that the vehicle operates efficiently while minimizing pollutants.

In contrast, the other options refer to separate issues. Low tire pressure affects vehicle handling and fuel efficiency, the need for an oil change relates to engine lubrication and longevity, and low fuel level pertains to fuel availability for operation. Each of these conditions might have their own warning lights, but the "Check Engine" light specifically targets the engine and emissions-related problems.