Knocking noise / Engine management light

Hi All,

Could someone tell me if they have had a knocking noise coming of there Fabia VRS nearside the following things have been checked and found to be ok.

1/ Usual bushes that split checked ok

2/ Engine mounts ok

3/ Usual faulty areas under car

The only thing that has not been checked is the anti roll bar bushes as we could not see them at the time.

Noise happens when going over bumps.

Engine management light stays on been on for months car runs fine I put a diagnostic machine on it to clear the code after replacing a fuel sensor which was found with the machine to be the reason the light was on changed sensor light is still on any ideas.

Thanks