BMW CAS units are problematic in the BMW world. There are an number of reason you may need the CAS synced or aliened from simple things such as a drained battery or even a battery replacement. Many CAS units faults and failures can be solved by a simple reset or a sync to the DDE, for instance the CAS module can cause many BMW’s not to start leaving multiple CAS errors this can be solved in under 15 minutes in most cases with a simple sync to the DDE (main engine ECU).
More technical reasons for CAS faults are things such as ECU / DDE Swapping or a used ECU / DDE, Both th CAS and DDE need a matching ISN code and require this unique ISN code to start. If the ISN codes do NOT match the vehicle will not start. When replacing with a used ECU / DDE there are a number of options depending on the initial ECU / DDE failure. The most straight forward way of getting a used ECU to work is to take a direct clone of the damaged ECU (software / firmware).
BMW 2F44 fault code is one of the most common BMW fault code relating to the CAS unit, in the majority of cases 2F44 will require the CAS to be reset and then Synchronised to the DDE / ECU.
If you are experiencing BMW CAS faults please feel free to get in touch, We are fully equipped with the latest BMW INST+, INPA and ISTA P giving us the exact same power to code and program just as your BMW dealer would. We are based in Saxmundham just off of the A12 inbetween Ipswich and Lowestoft.