[Kane.vernon]

hello i have a 2009 bmw 335i xdrive i bought the car being told it needed a cam shaft sensor and water pump and was told the car wouldn’t start because of the cam sensor once i got the car i got 3 codes for it i can’t remember one of them but one had to do with the crank sensor and then one for no communication with the dme i replaced the crank sensor and cleared the codes and the only one coming back is u0100 for no communication i checked all the fuses i tested the realays and checked all the grounds i could find all seem to be in good condition i also check if dme is getting power and it is the guy told me it had a new battery in it and it turns out he didn’t register the battery to the car and im not sure if that would cause this or no but at this point im at a total loss this is my first foreign car so i dont know all too much but i dont know what to do from here help please any info would be greatly appreciated.