The downstream oxygen sensor on bank 1 is malfunctioning.
Informational only. Consult a qualified mechanic.
Replace the downstream O2 sensor.
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.
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