The ECM is responsible for controlling the engine's functions and ensuring that it is running at optimal levels.

The ECM constantly monitors various sensors located throughout the engine and vehicle, such as the oxygen sensor, throttle position sensor, and engine temperature sensor. These sensors provide data to the ECM, which then adjusts various parameters to ensure the engine runs smoothly and efficiently.

One of the key functions of the ECM is to control the air-fuel mixture in the engine. By constantly monitoring sensor data, the ECM can adjust the fuel injection and ignition timing to ensure the engine is running at its most efficient level. This not only improves fuel economy but also reduces harmful emissions that can be emitted from the vehicle.

The ECM also controls other aspects of the engine, such as the idle speed, throttle response, and emissions control systems. By continually monitoring and adjusting these parameters, the ECM helps to ensure the engine is running smoothly and reliably.

In the event of a malfunction or error code, the ECM is equipped with diagnostic capabilities to help pinpoint the issue. Mechanics can connect a diagnostic tool to the ECM to read error codes and determine the root cause of any problems.

Overall, the engine control module in a Mazda CX-5 plays a crucial role in ensuring the engine runs efficiently and reliably. Its ability to constantly monitor and adjust engine parameters helps to optimize performance and fuel economy while minimizing harmful emissions.

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