What is the simplest way to reset a car's ECU?

[Amelia]

Drive for a while to allow the car to reach normal operating temperature, then park and turn off the engine, shutting down all electrical devices in the car. Open the car's hood, locate the battery, and disconnect the battery's power cables. Wait for 10 minutes before reconnecting, then turn on the power without starting the engine and activate the car's electrical devices, waiting for 30 seconds. Remove the key, and the reset is successful.

[OAxel]

The easiest way to reset the ECU is to disconnect the negative battery terminal. Use a wrench to loosen the negative terminal connector while ensuring the engine is off, wait 15-20 minutes, then reconnect it. The ECU will automatically clear its data and restart the learning process, which is highly effective for resolving issues like sluggish acceleration or unstable idle. I always recommend driving a few kilometers afterward to let the system adapt, but be cautious about activating anti-theft systems during the power interruption. If problems persist, professional diagnosis may be needed, but this zero-cost DIY method is safe and ideal for routine minor issues.