What does p0161 mean on a ho2s heater?
What does p0161 mean on a ho2s heater? P0161 is a diagnostic trouble code (DTC) for "HO2S Heater Circuit Malfunction (Bank 2 Sensor 2)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Why does my Chevy Silverado have a p0161 code? 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...