P2273 – O2 Sensor Signal Biased/Stuck Rich Bank 2 Sensor 2

 

P2273: DIY Repairing Video Tutorial

https://youtu.be/jWlEZFvulAo

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P2273 Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),High Fuel Consumption,Excessive Smoke from Exhaust  

P2273 Possible Causes

  Faulty Rear Heated Oxygen Sensor Bank 2,Rear Heated Oxygen Sensor Bank 2 harness is open or shorted,Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection,Exhaust gas leaks  

P2273 Description

  The Powertrain Control Module (PCM) supplies a voltage of about 450 mV between the HO2S high and low signal circuits. The oxygen sensor varies the voltage over a range from about 1,000 mV when the exhaust is rich, down through about 10 mV when the exhaust is lean. The PCM monitors and stores the heated oxygen sensor (HO2S) voltage information. The PCM evaluates the HO2S voltage samples in order to determine the amount of time the HO2S voltage was out of range. The PCM compares the stored HO2S voltage samples taken within each sample period and determines if majority of the samples are out of the operating range.