Trouble Code:
P0141 – Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
P0141 Code Definition
The Catalyst Monitoring Oxygen Sensor evaluates the rear most Catalytic Converter’s emissions-reducing capability. Code P0141 is set when the Rear Oxygen Sensor does not show signal activity indicative of closed loop fuel system operation within the required time.
Symptoms:
- Check Engine Light will illuminate
- In many cases, no abnormal symptoms may be noticed
- In some cases, the vehicle will fail an Emissions Test
- In many cases, the NOx emissions will be elevated
Possible Cause:
- Defective Rear Most Oxygen Sensor
- Faulty Rear Most Oxygen Sensor wiring or connections
Possible Misdiagnoses:
- Oxygen Sensor Sensor is replaced when the problem is a defective Catalytic Converter
- Oxygen Sensor is replaced when the problem is faulty sensor wiring or connections
- Oxygen Sensor is replaced when the problem is an exhaust leak before the Rear Oxygen Sensor