Can i retrieve CEL code from car … forgot what code it hade in my car .. put headgasket sealer and i erase the code ..

Can i retrieve CEL code from car … forgot what code it hade in my car .. put headgasket sealer and i erase the code ..
My car has an automatic transmission.

– Can i retrieve CEL code from car … forgot what code it hade in my car .. put headgasket sealer and i erase the code ..