Theory Of Operation
WARNING: This page is about a different car, the 2023 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.
The vehicle uses a secondary software to calculate engine RPM independently of the base RPM. The Powertrain Control Module (PCM) compares the value of the secondary software calculation and base RPM to determine if there is a discrepancy.