This just happened to me last week. I have since changed the fob battery but no change. Then I found out how to re-connect - or re-pair - the key to the car.
Open the car with the other key
With the door shut put the faulty key into the ignition
Turn the key from position 1 to position 2 and back 4 times - you should hear a beep, such as when the lights are left on
Take the key out of the ignition and press any button - you should hear the beep again
Then try the buttons. It took a few presses but then it was working perfectly.
You have no idea how much this helped. I haven’t read this anywhere else, most were saying you shouldn’t have to re-pair the fob. I got extremely lucky that this was just posted. I was messing with my fob for over an hour making sure the connection to the battery was right, and that nothing was disconnected on the board. Tried this, worked first try.
KEY FOB STOPPED WORKING
in Jaguar X-Type Club
Posted
You have no idea how much this helped. I haven’t read this anywhere else, most were saying you shouldn’t have to re-pair the fob. I got extremely lucky that this was just posted. I was messing with my fob for over an hour making sure the connection to the battery was right, and that nothing was disconnected on the board. Tried this, worked first try.