P0155 Heated Oxygen Sensor Heater Circuit (bank 2, sensor 1)
Left Bank Heated Oxygen Sensor (front) Heater Circuit
Check Conditions
60 seconds have elapsed from the start of the previous monitoring. Engine coolant temperature is higher than 20°C (68°F). While the left bank heated oxygen sensor (front) heater is on. Battery positive voltage is at between 11 and 16 volts.
Judgment Criteria
Heater current of the left bank heated oxygen sensor (front) heater has continued to be lower than 0.6 ampere or higher than 7.5 ampere for 4 seconds.
- Open or shorted left bank heated oxygen sensor (front) heater circuit.
- Open circuit in left bank heated oxygen sensor (front) heater.
- PCM failed.
Left Bank Heated Oxygen Sensor (front) Heater Circuit
Check Conditions
60 seconds have elapsed from the start of the previous monitoring. Engine coolant temperature is higher than 20°C (68°F). While the left bank heated oxygen sensor (front) heater is on. Battery positive voltage is at between 11 and 16 volts.
Judgment Criteria
Heater current of the left bank heated oxygen sensor (front) heater has continued to be lower than 0.6 ampere or higher than 7.5 ampere for 4 seconds.
- Open or shorted left bank heated oxygen sensor (front) heater circuit.
- Open circuit in left bank heated oxygen sensor (front) heater.
- PCM failed.