How do i reset a toyota matrix check engine light?

If You have a check engine light turn on while driving Your Toyota Matrix You will want to get off the road as soon as possible. Continuing to drive could lead to permanent damage happening to Your engine. When You are stopped You will need to use an OBD II scan tool to read the code that was stored in the ECU. This will let You know what component has detected a fault and will need to be replaced. You can always use an OBD II scan tool to clear the code and it will turn off the check engine light. This usually is just temporary though because if there is a problem that is not fixed then the error will just keep coming back.