What could be causing my Vauxhall Vivaro's engine to make a knocking noise?

I've noticed a knocking sound coming from my Vauxhall Vivaro's engine while it's running. This started happening after I filled up with diesel. Is there something wrong with my fuel or could it be a bigger issue?

It's possible that there is an issue with the quality of the diesel you used. Make sure to use reputable gas stations to prevent any potential engine issues.

You should also check your oil levels and make sure they are at the proper level. Low oil levels can cause knocking noises in your engine.

If the knocking noise continues, it's best to take your Vauxhall Vivaro to a mechanic for a proper diagnosis. Ignoring the issue could lead to further damage and even engine failure.