O2 Sensor Heater Circuit B2S1
The heater circuit in the upstream O2 sensor on bank 2 has failed.
Informational only. Consult a qualified mechanic.
- Blown fuse
- Faulty O2 sensor
- Wiring damage
Check fuse and replace sensor.
What does P0155 mean?
The P0155 OBD-II diagnostic trouble code (DTC) indicates: o2 sensor heater circuit b2s1. This is a low-severity powertrain code that your vehicle's onboard diagnostics system triggers when the heater circuit in the upstream o2 sensor on bank 2 has failed. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
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