P0136
O2 Sensor Circuit Bank 1 Sensor 2
2016-2021 Mazda CX-3 2.0L I4
Moderate SeverityPowertrainGeneric (SAE)
Description
General malfunction in the downstream O2 sensor circuit for Bank 1.
Symptoms
- Check Engine Light
- Failed emissions test
- Reduced catalyst monitoring
Common Causes
- Faulty downstream O2 sensor
- Wiring damage
- Exhaust leak after catalyst
Diagnostic Steps
- Test O2 sensor voltage
- Inspect wiring
- Check for exhaust leaks after cat
Repair Notes
Replace downstream O2 sensor.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
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- P0002Fuel Volume Regulator Control Circuit Range/Performance
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- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P0136 on Other Vehicles
Common Questions
What does code P0136 mean on a 2016-2021 Mazda CX-3?
P0136 stands for "O2 Sensor Circuit Bank 1 Sensor 2". General malfunction in the downstream O2 sensor circuit for Bank 1.
What are the symptoms of P0136 on a Mazda CX-3?
Common symptoms of P0136 include: Check Engine Light, Failed emissions test, Reduced catalyst monitoring.
What causes P0136 on a 2016-2021 Mazda CX-3?
Common causes of P0136 include: Faulty downstream O2 sensor, Wiring damage, Exhaust leak after catalyst.