O2 Sensor Heater Circuit B1S2
The heater circuit in the downstream oxygen sensor on bank 1 has failed.
Informational only. Consult a qualified mechanic.
- Blown fuse
- Faulty O2 sensor
- Wiring issue
Check fuse and replace O2 sensor.
What does P0141 mean?
The P0141 OBD-II diagnostic trouble code (DTC) indicates: o2 sensor heater circuit b1s2. This is a low-severity powertrain code that your vehicle's onboard diagnostics system triggers when the heater circuit in the downstream oxygen sensor on bank 1 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.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
Related Articles
Track codes on your vehicle — sign up free
Log OBD-II codes, get maintenance reminders, and keep your complete service history.