The check engine light scares more drivers that it should. That warning light is the vehicles way of telling the driver that one of the vehicle sensors is not working within specs. We find that 95% of the time the problem does not affect the driving or reliability of the vehicle. Depending on the year of the vehicle there may be over 90 possibilities for a sensor to trip the light. Then there are about 48 additional codes for the automatic transmission and some optional systems may add to the count.
I guess my best advice would be is if the vehicle is still driving normally and you don t notice any difference, then continue driving and contact the nearest Toyota dealer to schedule an appointment to have it looked at.