To reset a check engine light on a Toyota Echo, a diagnostic machine must be connected to the car's computer and the codes must be reviewed and repaired. The check engine light on a Toyota Echo is used to notify the driver of a problem in the vehicle's engine system. Once the code is reset, the light on the dashboard will turn off.Continue Reading
The diagnostic port is located on the dashboard inside of the cabin.
Once the port is located, connect the diagnostic machine to it.
Read the codes that are displayed on the machine and make the required repairs.
Once the problem is repaired reset the computer and clear the codes.