Why does my Vauxhall Zafira Life's check engine light keep coming on?

I have a 2018 Vauxhall Zafira Life and the check engine light keeps coming on. I've checked the gas cap and made sure it's secure, but the light still stays on. What could be causing this issue and how can I fix it?

There are a few possible reasons why your check engine light is staying on. One possibility is that there is a malfunction with one of the sensors in your car. It's important to get this checked out by a mechanic as soon as possible to prevent any further damage to your vehicle.

Another potential cause is a faulty catalytic converter. This component helps reduce the harmful emissions from your car's exhaust, so it's important to get it fixed to avoid causing harm to the environment and potentially failing an emissions test.

It's also possible that there is an issue with your O2 sensor, which measures the oxygen levels in your car's exhaust. If this sensor is not functioning correctly, it can cause your check engine light to turn on. A mechanic can help diagnose and replace the faulty sensor.