How to Reset the Check Engine Light in a Toyota Corolla

by Katebo
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Any Toyota Corolla made in 1996 or later will come with an On-board Diagnostics II computer (OBD II). When the check engine light illuminates on the Corolla, it is coming from an error code sent from a sensor to the computer in the car. It indicates a problem that needs to be addressed by a qualified mechanic as soon as possible or you may risk further damage to the vehicle. After the problem has been diagnosed and repaired, you can reset and erase the light yourself at home with just a few moments of your time.

Step 1

Find the Diagnostic Link Connector (DLC) on the lower left side of the dashboard on the driver's side of the car. You can find it near the hood release.

Step 2

Plug an OBD II scanner into this port and put the key in the ignition. Turn the key forward about two clicks, taking care not to start the engine. This will power the scanner.

Step 3

Scroll through the menu on the scanner using the arrow keys until you find the command that says "Erase Codes." Press "Enter." (Some scanners have a separate "Erase" button that you can press instead.) Wait for the main menu to appear or until you see the message on the scanner that says "Command Sent."

Step 4

Unplug the OBD II scanner and start the vehicle. Look at the instrument panel to make sure the check engine light has turned off.

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