P0157
PowertrainOxygen Sensormoderate severityO2 Sensor Circuit Low Voltage Bank 2 Sensor 2
What P0157 Means
Low voltage from the downstream O2 sensor on Bank 2.
Symptoms
- Check Engine Light
Common Causes
- Faulty sensor
- Short to ground
- Exhaust leak
Diagnostic Steps
- Test voltage
- Check for shorts
Where to start: Replace sensor.
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