Toyota 2 2 Engine Diagram

What do i do to clear trouble code 31 and 52 on a 1994 toyota camry 4 Camry toyota engine 1995 sensor diagram le exhaust code located 2l 1994 vacuum firewall manifold idle ecm do rpm knock toyota 2 2 engine diagram

What do I do to clear trouble code 31 and 52 on a 1994 toyota camry 4