What is the cause of rough idling in a Vauxhall Insignia?

I have noticed that my Vauxhall Insignia has been idling rough lately. It seems like the engine is struggling and the car is shaking. What could be causing this issue?

One possible cause of rough idling could be a dirty or clogged air filter. It is recommended to check and replace the air filter regularly to avoid this issue.

Another possible cause could be an issue with the spark plugs. If they are worn out or dirty, they can affect the engine's performance and cause rough idling. Consider replacing them if needed.

Low fuel pressure can also cause rough idling. It is important to regularly check the fuel pressure and replace the fuel filter when necessary.

In some cases, a faulty oxygen sensor can also be the culprit. It is responsible for measuring the amount of oxygen in the exhaust and can affect the engine's performance when not functioning properly.