Please guys i have not yet resolved this issue. I have been trying so hard to know exactly what is wrong with this car and am yet to figure anything out.
Please someone help me out with this. What scanner can i use to know exactly which module is communicating and which one is not.

UPDATE: I found that the previous owner changed the BCM(has a mark on it). I don't know if it was changed before it had the problem or before it had the problem. What issues should i get if the BCM is not matching the car? What do you guys suggest to get this car fixed?
Thanks and waiting for your response.