Hello,
I have an bmw f12 in. CAS had been downgraded and key added. vehicle cranks but doesn't start. Flashed CAS with a donor flash file. Reading the ECU isn it reads a string of 00 and 0C. CAS isn looks fine. Only Fault code is "immobiliser ews authentic response not received". Has anybody dealt with this before. CAS is 5m48h ECU bosch edc17