Hi, tried searching but could not find the answer I need. My remote locking on my 2014 step way is getting intermittent. If I use the car and then use remote to lock, all good. If I leave the car, for say more than a few hours then nothing, this is the same with both keys (and I've put new batteries in to check). Does anyone know if there is a small battery in the car which helps charge the transponder signal from the key. Like I say if I use the car and then get out I can lock car with remote from any distance (on either key), leave it a while though and come back to car and neither key works no matter how close, so I have to use manual door lock in passenger door, and once passenger door open pressing the central dash lock button does nothing so I have to physically go round and unlock all door using internal door handle. Once the car has been used for a while everything back to normal. Main car battery is fine, and never had issues with this. I am presuming that if I unlock passenger door manually, pressing the dash 'lock' button should unlock everything? Any suggestions?