2000 trundra bank 2 sensor1 replaced check engin back on with p0155

Question

Had o2 bank2 sensor1 replaced check engine light came back on the next day.

Answer 1

Hi there

This code is for the heater circuit on the sensor. Check the O2 sensor fuses under the hood and check the wiring to make sure it's not touching or rubbed through the insulation, if it has it can cause this code.