I've had this problem for a while with my fob... The odd time I will lock the car with the fob...walk away to do whatever and come back and the fob won't lock or unlock the car so I have to use the key...I then reset the key fob and everything works fine for a while but after resetting it last night I could only unlock the car with the fob...not lock it! Anyone help me out here as I only have the one fob at the moment 
Thanks 👌