Why is my Vauxhall Combo Life engine making a strange noise?

I have noticed that my Vauxhall Combo Life's engine has started making a strange noise recently. It's almost like a knocking or rattling sound. I'm worried that it could be a sign of a bigger problem. What could be causing this noise and how can I fix it?

The most common cause of unusual engine noise is low oil levels. Check your oil level and top it up if necessary. If the noise persists, it's best to take your vehicle to a qualified mechanic for further diagnosis.

Another possible cause could be a faulty belt or pulley. If the noise increases or decreases with engine speed, it's likely a belt issue. Have a mechanic inspect and replace any damaged belts or pulleys.

A dirty air filter can also cause strange engine noises. Make sure to replace your air filter regularly to prevent any engine issues.