P0159
O2 Sensor Circuit Slow Response Bank 2 Sensor 2
2019-2019 Buick Enclave 3.6L V6
Low SeverityPowertrainGeneric (SAE)
The 2019 Buick Enclave is equipped with a 3.6L V6 engine. Below you'll find detailed p0159 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Slow response from the downstream O2 sensor on Bank 2.
Symptoms
- Check Engine Light
- Failed emissions
Common Causes
- Aging sensor
- Contaminated sensor
Diagnostic Steps
- Monitor response
- Test sensor
Repair Notes
Replace sensor.
Related Codes
Other Powertrain Codes
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- P0003Fuel Volume Regulator Control Circuit Low
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- 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
P0159 on Other Vehicles
Common Questions
What does code P0159 mean on a 2019-2019 Buick Enclave?
P0159 stands for "O2 Sensor Circuit Slow Response Bank 2 Sensor 2". Slow response from the downstream O2 sensor on Bank 2.
What are the symptoms of P0159 on a Buick Enclave?
Common symptoms of P0159 include: Check Engine Light, Failed emissions.
What causes P0159 on a 2019-2019 Buick Enclave?
Common causes of P0159 include: Aging sensor, Contaminated sensor.
Last updated: March 2026