A Tesco spokesperson said its garages had a system which allowed disabled drivers to contact a member of staff in the kiosk using a special key fob to call for assistance.
This used a short signal which came on briefly to alert staff that someone needed help. But at Clifton Moor this had become jammed on and had blocked the remote central locking and ignition frequencies used by some cars.
A Tesco spokesperson said its garages had a system which allowed disabled drivers to contact a member of staff in the kiosk using a special key fob to call for assistance.
This used a short signal which came on briefly to alert staff that someone needed help. But at Clifton Moor this had become jammed on and had blocked the remote central locking and ignition frequencies used by some cars.