P0155 – O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1) P0155 – O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
P0138 – O2 Sensor Circuit High Voltage (Bank 1 Sensor 2) P0138 – O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0420 – Catalyst System Efficiency Below Threshold (Bank 1) P0420 – Catalyst System Efficiency Below Threshold (Bank 1)
