the 'factor' message I think is a partial message for 'Factory reset'
and refers to a loss of battery power to the body control module
I'd suggest getting a dealer level scan tool plugged in so the monitoring functionality between modules can be tested as if you have a loss of comms then the security system will prevent an engine start
sorry its not a more DIY answer but this is often the case with security systems
do you still need help?
Bear in mind that the site takes a deposit from you at the beginning andthis is held by the site until you rate my answer at which point the cash issplit between the site and the expert. I am only paid for my work on thisquestion if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you