O2 Sensor Circuit B1S2
The downstream oxygen sensor on bank 1 is malfunctioning.
Informational only. Consult a qualified mechanic.
- Faulty O2 sensor
- Wiring issue
- Exhaust leak
Replace the downstream O2 sensor.
What does P0136 mean?
The P0136 OBD-II diagnostic trouble code (DTC) indicates: o2 sensor circuit b1s2. This is a low-severity powertrain code that your vehicle's onboard diagnostics system triggers when the downstream oxygen sensor on bank 1 is malfunctioning. 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.
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