What causes the 'check engine' light to turn on in a Vauxhall Astra?

I've noticed that the 'check engine' light has turned on in my Vauxhall Astra. What could be causing this and how can I fix it?

There could be several reasons for the 'check engine' light to turn on. It could be a simple issue like a loose gas cap or a more complex problem with the engine. It's best to take your car to a mechanic to get it diagnosed and fixed.

I had the same issue with my Vauxhall Astra and it turned out to be a malfunctioning oxygen sensor. Don't ignore the warning light as it could indicate a serious problem with your car. Get it checked as soon as possible.

I've had this problem before and it was due to a faulty electrical connection. The mechanic was able to fix it quickly and it didn't cost me much. So don't worry, it may not be a major issue.

I've heard that the 'check engine' light can also turn on if your car's battery is getting old. You may need to replace your battery in order to solve the issue.