The ECM, also known as the engine control unit (ECU), is a small computer that is responsible for monitoring and controlling various functions of the engine.

In the Camry, the ECM is located under the hood, usually near the engine compartment. It is connected to several sensors in the engine and throughout the vehicle, such as the oxygen sensor, mass air flow sensor, and throttle position sensor. These sensors provide vital information about the engine's temperature, speed, and other factors, which the ECM uses to make real-time adjustments to ensure smooth and efficient operation.

The ECM in the Camry is programmed with specific algorithms and parameters that dictate how the engine operates under various conditions. For example, it can adjust the air-fuel mixture, ignition timing, and fuel injection to optimize performance and fuel efficiency. Additionally, the ECM also controls important systems such as the transmission, emissions control, and electronic stability control.

One of the key features of the ECM in the Camry is its ability to diagnose and store trouble codes when a problem is detected. These codes can be read using a diagnostic tool, allowing mechanics to quickly pinpoint and resolve any issues with the engine or related systems.

Overall, the engine control module in the 2021 Toyota Camry is a sophisticated piece of technology that plays a vital role in ensuring the smooth and efficient operation of the vehicle. Its ability to monitor and control various engine functions in real-time makes it an essential component for modern automobiles.

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