Good morning, on this car that has broken down because of the battery, after replacing it with one with the same characteristics (70 ah AGM) the vehicle will not start. Diagnosis with Magneti Marelli Logic and Bosch KTS 560 gives me DTC P0915. With both testers there is no transmission learning function. In fact a line appears in the instrument display instead of the gear engaged. I wanted to know if there is a manual way of learning or do I have to take it to the Citroen network. Thank you.