2000 honda passportWhere is this located? P0155 Front heated o2 sensor bank 2 ?Thx

Question

I got code p0155

A/f sensor 21 heater system malfunction. I would like to know where it is located and what is means

Thx

Answer 1

P0155 02 sensor heater circuit malfunction Bank 2 Sensor 1

The location for this 02 sensor is where cylinder 2 is located at being sensor 1 this would make it the upstream 02 sensor. What the heater sensor does is it rapidly heats the 02 sensor so it can perfrom its fuel control job. When the heater circuit of the 02 sensor fails it usually the 02 sensor itself. Here is a 02 sensor that coded a P0155 the cause for the code was the 02 sensor was not properly secured, which set a heater code.