16514moderate severityPowertrain
O2 Sensor Circuit Bank 1 Sensor 1
on 2019 Volkswagen Jetta 1.4L I4 TSI · FWD
What this code means
A general circuit fault is detected on the upstream oxygen sensor Bank 1 Sensor 1 (OBD P0130). This affects fuel mixture control.
Symptoms
- Poor fuel economy
- Rough idle
- Check engine light on
Common causes
- Faulty oxygen sensor
- Wiring or connector fault
- Exhaust leak near sensor
- Faulty ECM
Diagnostic steps
- Read live O2 sensor data
- Inspect sensor wiring and connector
- Check for exhaust leaks
- Test sensor heater and signal
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