84931-24030 appears to be the switch below the radio head unit that operates the door so I don't think it will be that.🙂
I thought it was a rare fault but we have seen and chased this or similar on a few cars now and I don't recall anyone reporting that they solved it. The first thing I would do is connect Techstream or a good obd reader to see if there are any stored fault codes. Some of the advanced equipment can send signals to the switches to test operation too.
If you can't easily test for codes, it does sound like a wiring /connection / earth fault to me so I would carefully check the fuses and fuse junction box in the boot and if that looks fine then the wiring to the boot lock/latch and the fuel filler release. I would start by pulling fuse 33, to disconnect the fuel flap and test it. If no change, try fuses 36/37 for the boot lock.
I think we looked at the following in the past;
Fuel flap lock
Valet switch connections (glovebox)
Master door lock switch on driver's door.
Gateway ECU
Wiring fault in boot/signs of damp that might cause an issue.
The boot release and fuel flap switch connections