Hi. Defender 2020 110 S... The passenger door will not lock either by pressing the internal switch, via the FOB or when the car reaches 18 kph (as set via the software) Thoughts? Thanks

 

You could check fuse 27 in the passenger compartment fuse box. That's the one for the passenger door.

 

When I took delivery of my MY22 I had the same issue. Wouldn’t lock by any means. Tip-off was that when I locked the vehicle with the fob, I would get a beep-beep, which indicates a locking fault. Went right back to the dealer and they had to do some software tweaking, but it was fixed promptly. Do you get the double beep sound? It’s an easy fix.

 

My Defender '22 has the same beep-beep locking error you describe. Can you refer me to your dealer in case my dealer in Ohio isn't able to correct via software adjustment?
thanks,
BRowe

 

My dealer replaced the locking module. I deal with Treasure Coast Land Rover/Jaguar in Fort Pierce, Florida.