P0171 code on 2000 Toyota Avalon cause?

Question

getting P0171, P0128, P03330, P0420 codes on this 2000 Toyota Avalon.  Any suggestions?  Air Filter is clean.

Answer 1

P0171 Fuel trim lean Bank 1

P0128 Cooling system malfunction

P0330 Knock sensor malfunction

P0420 catalytic below threshold

When there is a knock sensor code and a cooling system malfunction, check the radiator your fluid if its is low would set a P0128 followed by a knock sensor ,