P0136
O2 Sensor Circuit Bank 1 Sensor 2
2008-2008 Audi A8 4.2L V8
Moderate SeverityPowertrainGeneric (SAE)
The 2008 Audi A8 is equipped with a 4.2L V8 engine. Below you'll find detailed p0136 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
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
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0136 on Other Vehicles
Common Questions
What does code P0136 mean on a 2008-2008 Audi A8?
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 Audi A8?
Common symptoms of P0136 include: Check Engine Light, Failed emissions test, Reduced catalyst monitoring.
What causes P0136 on a 2008-2008 Audi A8?
Common causes of P0136 include: Faulty downstream O2 sensor, Wiring damage, Exhaust leak after catalyst.
Last updated: March 2026