I have a MY14.5 Outlander ES and recently one of the car keys has stopped working (no red light and does not open/lock car remotely). I have tried replacing the battery but it still does not work nor light up red.

Is this a problem with the key, or is there some "re-initialisation" that I might need to perform to re-activate the key? I recently had the car battery replaced and the key stopping working has coincided with this... hence my wondering about a re-activation of the key?

Many thanks.