What Does the P0161 BMW Code Mean? The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. P0130. P0234. P0403. Znaczenie kodu usterki P0161 to: Awaria obwodu grzałki czujnika O2 (Bank 2, Czujnik 2). Dowiedz się, co to dokładnie oznacza, jakie są objawy i przyczyny kodu P0161 oraz jak usunąć awarię. 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. 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 P0161 is a very common OBDII code that occurs in the Chevy Silverado. It is typically caused by a failure in one of the elements that heat the oxygen sensors, specifically bank 2 sensor 2. Replacing the Oxygen sensor will fix the problem a majority of the time. Some of the other causes of P0161. How to Diagnose and Fix the Cause of P0161 Code As the causes of a heater circuit issue are limited, the diagnosis process is fairly straightforward. You'll need simple tools, an OBD II scanner and a way to safely get under the car. .

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