No components need to be replaced to repair the fuel injector flow rate. To calibrate the flow rate correctly, the service personnel must reprogram the Engine Control Module with new settings.

GM has published a service bulletin describing a fix for 2021 Cadillac CT4 sedans with an Engine Control Module that fails to report catalytic converter faults.

Knock sensors are devices used in internal combustion engines to detect engine knock or detonation. The knock sensor detects vibrations and sends a signal to the engine control module (ECM), to ...

The Engine Control Module (ECM) is the computer responsible for controlling the engine. The ECM communicates with other vehicle control units via a communication bus.