Hi, my name is***** your mechanic automotive expert, and I will be happy to assist you today. In some cases, I may need more information to assist better. I apologize for any delay and would like to know whom i am having the pleasure to chat with.
Dear customer for the code u do not worry, it is simply a problem with the communication of a module this is surely because the software version has problems to connect correctly with your ford.
Star stop systems are quite delicate systems, any alteration in the working parameters or a generation of a error code can cause the system to be disabled.
You are presenting the code b1047 is speaks of a problem in the signal of the airbag modules , The problem is that it is not a specific error code, probably because the diagnostic equipment you are using is very simple and does not have adequate software, which is why it is holding the error code u1739.
As long as you have the generation of an error code on in the computer, the start-stop system will not be able to work as a precaution, that is why I would recommend that you make a good diagnosis, not necessarily in a dealership, but that you use a diagnostic equipment with Ford software and if you have used one when you had these error codes, you tried to use another that has another, more up-to-date version, or enter your vehicle data through the vin code because sometimes when we try to enter the Ford KA 2014 we may have variations of the versions, this can happen.
I hope this info to be helpful, my goal is to give you the best advice i can, I hope to be helpful, if you have any doubt or want to know anything else please do not hesitate to reply back.
Kind regards, Sebastian.