V50 Engine 2.4 : Emissions Warning Light

[Thierry14]

Has anyone had issues with repeated Emissions warning light on V50s ?
I have a 2005 V50 2.4 which is now suffering repeated Emissions warnings.
Due to a severed radiator pipe and subsequent immediate loss of water, a warped cyclinder head was diagnosed by the Main Dealer several weeks ago and which was then replaced by said Dealer, however since then I have experienced the emissions light on several occasions. The first time of which was before I even got it off the forecourt following the cylinder head replacement. The Dealer the had the car several days and I believe "cured" the issue with new software, however two weeks on and the warning light has reappeared.
I am now waiting for garage to reopen on 02/01 to get it investigated further but wonder if anyone else is experiencing issues.
Engine seems to run fine and there does not appear to be any further loss of water, however I am wary to run the car should there be a major issue.