2002 Toyota Celica CHECK ENGINE LIGHT

Replaced both oxygen sensors with universal type and still the code reads P0135 and P0141.
Should I replace them with OEM or maybe the problem is something else?

Recently had smog test done here in California, all items pass except the check engine light, which unable me to find a fix. Also there is no avalable repair manual for my 2002 Toyota Celica.

Thank you for any help or advise, I have no other resources that I can find.

Chris