What could be causing a high-pitched noise in my Vauxhall Insignia?

I have recently noticed a high-pitched noise coming from my Vauxhall Insignia when I accelerate. It seems to be coming from the engine area. What could be causing this and how can I fix it?

It is possible that the noise could be caused by a faulty alternator or serpentine belt. It is also worth checking the tension of the belt and replacing it if necessary. You may also want to check for any loose or damaged engine components.

Another possible cause could be a problem with the exhaust system. It could be a loose or damaged component, such as a muffler or catalytic converter. It is best to have a mechanic inspect your exhaust system to determine the cause of the noise.

Check your transmission fluid level as well. If it is low, it could be causing the transmission to make a high-pitched noise. In this case, you will need to refill the fluid to the proper level.