Question

2002 Chevrolet Trailblazer 3.7L V6 with code P0155. Where do you buy the part?

Answer 1

HI there,

This code is for the bank 2 O2 sensor, sensor 1. The code is specific to the heater circuit and most of the time the cause is the sensor itself. You can pick up an O2 sensor at any parts store.