Which side of engine P1133 sensor on. radiator or firewall

Question

Got 3 check engine codes
PO172 Fuel system too rich Bank 1
PO300 Engine misfire detected
P1133 HO2's Bank 1 Sensor I insufficient switching

Answer 1

P1133 is for Bank 1 which is located on the left hand side

​ The 02 sensor may not be at fault, When there is a rich codntion check the fuel pressure regulator vacuum connection, fuel can seep into the vacuum connection and cause a rich running condition