P0155 CHEVROLET – HO2S Heater Performance Bank 2 Sensor 1

 

P0155: DIY Repairing Video Tutorial

https://youtu.be/Z7ntpSlq4Ls

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

 

P0155 CHEVROLET Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),Possible higher fuel consumption,Possible more smoke from exhaust than usual  

P0155 CHEVROLET Possible Causes

  Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1,Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse,Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground,Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection,Faulty Engine Control Module (ECM)  

P0155 CHEVROLET Description

  The Powertrain Control Module (PCM) supplies a bias voltage (approximately 450 mV) on the Heated Oxygen Sensor (HO2S) signal high and low circuits. When you turn the ignition to the ON position, battery voltage is supplied to the HO2S heater. As the heater reaches the operating temperature, the HO2S voltage responds by changing from a bias voltage range to the normal operation. Typically, as the HO2S reaches the operating temperature, the HO2S voltage goes from a bias voltage to a voltage below 300 mV. Depending on the exhaust gas content, it is possible for the HO2S voltage to go above 450 mV.