P0158
PowertrainOxygen Sensormoderate severityO2 Sensor Circuit High Voltage Bank 2 Sensor 2
What P0158 Means
High voltage from the downstream O2 sensor on Bank 2.
Symptoms
- Check Engine Light
- May indicate catalyst failure
Common Causes
- Faulty sensor
- Catalyst failure
- Rich condition
Diagnostic Steps
- Test voltage
- Check catalyst
Where to start: Replace sensor or catalyst.
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