P0031 - O2 Sensor 1/1 Heater Circuit Low P0032 - O2 Sensor 1/1 Heater Circuit High P0037 - O2 Sensor 1/2 Heater Circuit Low P0038 - O2 Sensor 1/2 Heater Circuit High P0051 - O2 Sensor 2/1 Heater Circuit Low P0052 - O2 Sensor 2/1 Heater Circuit High P0057 - O2 Sensor 2/...