A method of transmitting information making it possible to monitor the operation of an internal combustion engine, includes the steps of: measuring the angular position of a crankshaft via an absolute position sensor provided with a digital output, and transmitting at a frequency f1 to an engine control unit the measured angular position information, encoded in a data string containing N1 bits, transmitting at a frequency f2 of the measured angular position information, encoded in a data string containing N2 bits, the number N2 of bits being greater than the number N1, the frequency f2 being less than or equal to the frequency f1. The encoding in N1 bits allows transmission of angular position information at low resolution, whereas the encoding in N2 bits allows the transmission of high resolution information, able to detect misfirings.