P0132
PowertrainOxygen Sensormoderate severityO2 Sensor Circuit High Voltage Bank 1 Sensor 1
What P0132 Means
The upstream O2 sensor voltage on Bank 1 is staying above 0.45V, indicating a rich condition or sensor fault.
Symptoms
- Check Engine Light
- Rich running
- Black exhaust smoke
- Poor fuel economy
Common Causes
- Faulty O2 sensor
- Leaking fuel injector
- High fuel pressure
- EVAP purge valve stuck open
Diagnostic Steps
- Monitor O2 sensor voltage
- Test fuel pressure
- Check for leaking injectors
- Inspect EVAP purge valve
Where to start: Replace O2 sensor or fix rich-running cause.
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