ASB

Re: 13 plate XF Sportbrake, 35000 mls The warning message Smart Key Battery Low came on. The old battery was 2.5 v I replaced the battery in the key, the key works and has a good range but the warning message stayed on. I checked with the second key and the warning message is still there. That key also works at a good range. I can't see any means of resetting the warning system, is that necessary?. Any thoughts / suggestions to clear the message would be very welcome please.