Putting the key in the door when the car has been locked with the fob sometimes causes an instant alarm sound on mine also, but it's only if it's been deadlocked. (Locked twice) Or if the car has locked with one door not closed properly as can sometimes happen. If the car is just locked 1 stage it doesn't do it on my car. Replacement Keys | Jaguar. The Car Key Company comprises a number of independent Vehicle Locksmiths and Car Key Engineers across the UK. The main purpose of a vehicle locksmith is to attend to matters related to your vehicle keys. Our main area of work is producing replacement keys for your vehicle; cutting them and programming them. The key fob is faulty: If the battery isn’t the problem, the issue may be with the fob itself. If you go to your car dealer, they can hook the fob up to a computer and make sure that the programming is still good. If it’s not sending a signal, the fob will likely have to be replaced. This will scan the GEM ( control module ) fault memory and will trace the cause of the fault down quickly - and so actually, very cost effectively. To explain a little further - on this model - any programming / re programming of the remote fob keys, has to be done with plug in equipment - it cannot be done manually. Step by step instruction and other info: Smart key battery low. Hi guys just a general query regarding my smart keys, both of them are indicating on the instrument panel, low warning. Seems a bit odd that both are showing low as one of them is never really used, anyhow, my question is , can I use the car until I can arrange to have new batteries fitted. The nearest dealer is 50mls away. In either scenario whether it be water ingress or battery disconnection the BCM/CJB becomes corrupt. Luckily it keeps a backup of itself which wouldn't be corrupt. So you have to extract this and write it back. But it involves reading the EEPROM, playing around with it and writing it back. Jaguar F-TYPE key fob not working – causes and how to fix it 1. Dead battery in key fob. Dead battery is the leading cause of key fob not working in F-TYPE. Usually there are signs 2. Poor battery connection. The battery inside the key fob of F-TYPE has metal retaining clips that hold the battery Smart key not recognised. Like many, my car has been parked up during lockdown, with only a weekly supermarket trip a couple of miles down the road. However yesterday when I went to start the car I got a message "smart key not recognised, please reposition as shown" (or words to that effect). I tried taking the key out of my pocket and laying I know there are a number of topics on this subject but after not using the car since November, one short run in January the car is left unlocked in the garage and started ok but when I got to my destination some 20 miles the key fob would not lock the car I sat in the car and pressed the fob about 4-5 times and it locked and unlocked ok. itI6Z.