It appears something similar has happened with Northern Trains’ class 195/331 units, although in this case only about a fifth of the fleet has been temporarily removed from traffic:
https://www.google.co.uk/amp/s/www....hdrawn-by-northern-as-fault-detected.html/amp
https://www.google.co.uk/amp/s/www....hdrawn-by-northern-as-fault-detected.html/amp