An automotive sensor reads from memory previously stored back-calculated diagnostic-code values for which a fixed cyclic-redundancy-check value is valid and transmits the previously stored back-calculated diagnostic-code values read from memory each paired together with the fixed CRC value. The data is formatted so that a selected group of data can be accessed by a specific customer by using an identifier which is unique to that customer’s data. This output value is used in further processing wherein, in the second processing, the output value is compared with stored values for an output value for defined events.