P0159
PowertrainOxygen Sensorlow severityO2 Sensor Circuit Slow Response Bank 2 Sensor 2
What P0159 Means
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
Where to start: Replace sensor.
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