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To reset the engine light on a Toyota Corolla, begin by ensuring the car is turned off. Locate the OBD-II port under the dashboard, usually near the steering column. Using an OBD-II scanner, connect to the port, power it on, and follow the device instructions to clear the error codes, effectively resetting the engine light. If you don't have access to a scanner, a manual reset can sometimes be achieved by disconnecting the car's battery for a few minutes, then reconnecting it. However, this method might also reset other vehicle settings. Note: The engine light, also known as the Check Engine Light (CEL), illuminates due to various issues from minor to severe. It's advisable to address the underlying problem causing the light to activate before resetting it, to prevent potential damage to your vehicle. If unsure about the issue, consulting a professional mechanic is recommended for a proper diagnosis and repair.