P0136 O2 Sensor Circuit (Bank 1 Sensor 2)
Fault in the circuit of the downstream (after the catalytic converter) oxygen sensor, Bank 1 Sensor 2.
Common causes
- Faulty oxygen sensor
- Wiring or connector damage
- Exhaust leak near the sensor
Symptoms
- Check engine light
- Usually no driveability change
What to check
- Inspect wiring routed near the exhaust
- Check for exhaust leaks
- Watch sensor voltage switching on a scan tool
Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0136, follow the service information for that make and model.
Related codes
- P0130 O2 Sensor Circuit (Bank 1 Sensor 1)
- P0131 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
- P0132 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1)
- P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
- P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
- P0135 O2 Sensor Heater Circuit (Bank 1 Sensor 1)