Turn off check engine lights for 2003 Toyota Matrix?

To turn off the check engine light on a 2003 Toyota Matrix, you can use an OBD-II scanner to read and clear the diagnostic trouble codes (DTCs) that triggered the light. Alternatively, you can disconnect the car battery for about 15 minutes to reset the system, but this may also erase other stored settings. If the light reappears, it indicates an ongoing issue that needs to be diagnosed and repaired. Always address the underlying cause to prevent further problems.