NissanTech375 wrote:Do you have a mobile phone charging device installed in a power port of this car?
Do you have a building security pass chip device on your key ring or on your person?
Do you have music stored on a flash drive/chip attached to the car?
If you have any of these devices, keep them away from your car and see what happens.
I've seen this issue.
DaveinOlyWA wrote:my cellphone car charger is plugged in 24/7. i know, not good but that is the way it is. i also have 7 RFID Charge cards in my sun glass holder, 2 other RFID badges (work thing) as well.
I have at least 5 RFID devices in my car as well and I've plugged in many things into the power and usb ports without any issues. But this note from NissanTech375 does make for an interesting hint. The likelihood of an RFID interfering with the fob power control system is remote, however, I have myself noticed that when my fob is in the same pocket as my phone the car will not respond to it. Whether this is because the phone is blocking the signals or somehow interfering with them I do not know but this shows that things can go wrong. (The phone itself is not an RFID device.) Next time this happens I suppose you could move all the RFIDs to the cargo area to see if the car will respond to you.
But... given all the OTHER issues you are encountering from your original post this sounds a lot more like what Ingineer thinks--faulty hardware generating random issues. I think the firmware update was likely coincidence. We always try to figure out "what changed recently" but in reality sometimes stuff just randomly fails. This occurs quite often during service visits, not because techs are inept (well, usually not), but just because they are in there poking and prodding things and sometimes that is all it takes to break something that was already close to failure.
So I would demand they replace the whole on-board computer or else go for the lemon law. I mean no one else is seeing any of this stuff and its a wide array of issues. I find it ridiculous that Nissan isn't doing more to fix this. My opinion of them is going downhill as well.