What repairs can fix the P0161 code? Replacement of the bank 2 sensor 2 oxygen sensor; Repairing the wiring in the heater circuit; Need help with a P0161 code? YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service The P0161 code only applies to cars with V6 or V8 engines. If your vehicle only has four cylinders, it will only have one bank and, typically, one downstream sensor, so it can't trigger this code. Instead, a faulty downstream heated oxygen sensor will be set as P0141 or Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2) . Issue + Repair History: MIL light on. Code P0161 stored indicating oxygen sensor heater circuit failure. Uncertainty about which of the 4 O2 sensors had the faulty circuit. Replaced bank 2 sensor 2 (rear sensor, right side) but the light came back on. All 4 positions use the same part numbered O2 sensor. dZrLyi.

how do i fix code p0161