How to troubleshoot a misfiring engine in Vauxhall Insignia?

Recently, my Vauxhall Insignia started to misfire and the engine light came on. It feels like it's not running on all cylinders. What could be the cause of this issue and how can I fix it?

Firstly, check the spark plugs and replace them if needed. If the problem persists, it could be a faulty ignition coil or fuel injector. I would recommend taking it to a trusted mechanic for a diagnosis and potential repairs.

In some cases, a misfiring engine can be caused by a clogged air filter. Try cleaning or replacing the air filter and see if that solves the issue. If not, it could be a problem with the engine's compression or timing. It's best to get a professional opinion on this.

One thing you can try is using a fuel system cleaner to remove any buildup in the fuel injectors. If that doesn't work, it may be a problem with the engine's sensors or the EGR valve. Again, it's best to take it to a mechanic for a proper diagnosis.