Often your local auto parts store can read trouble codes where you may need to replace your o2 sensors, and have your catalytic converter inspected. Verify your gas cap seal is not dry rot and needs replacement, this can an inexpensive remedy.
〉 Answered on Oct 21st, 2013 by Amanda J. Pierce, MBA "AJ", Certified Mechanic, Project Coordinator; Primavera Scheduler at VIGOR Alaska Industrial Shipyard & BizzM3ch Solutions
When the check engine light comes on it is your Celica's computer telling you something is wrong. You can erase the code that is stored in the computer which will turn off the light, but until whatever is wrong is repaired, the light will probably come back on.
〉 Answered on Oct 21st, 2013 by Amy Mattinat, Owner and Author at Auto Craftsmen Ltd
You have to have the problem fixed. You can't just shut it off.
〉 Answered on Oct 21st, 2013 by Barb Petrey, President - DBK Enterprises Inc at Jiffy Lube
Fixing the car will shut off the check engine light. The codes should be pulled and diagnosed by a qualified technician as it requires jumping pins in the DLC connector to check this. Removing the EFI fuse in the main fuse panel for 30 seconds should reset the light, but if there is an issue the light will re-illuminate. Ignoring a minor problem now may cause a bigger problem later on.
〉 Answered on Oct 21st, 2013 by Helaine Kurot, Owner/Technician at 360 Automotive