DTC P0155 Audi

O2 Sensor Heater Circuit Bank 2 Sensor 1

O2 Sensor Heater Circuit Bank 2 Sensor 1

Description

Modeled exhaust gas temp. , > 250 °C Heater control, Active ECT at start, >48 °C Engine shut off time, >120 Sec. During ECM keep alive time after ign off, <950 Sec.

Cause and Solution

HO2S Fuses
HO2S terminal corrosion
Open between HO2S and Power supply relay
Open or Short? between HO2S and ECM
Faulty HO2S

Video Guide

Duration: PT4M15S | Uploaded: 2020-06-20

Diagnostic Info

  • DTC Code: P0155
  • Brand: Audi
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