16516moderate severityPowertrain
O2 Sensor Circuit High Voltage Bank 1 Sensor 1
on 2015 Volkswagen Eos 2.0L Turbo I4 · FWD
What this code means
The upstream oxygen sensor signal voltage is too high on Bank 1 Sensor 1 (OBD P0132). This indicates a rich signal or circuit fault.
Symptoms
- Poor fuel economy
- Rough running
- Check engine light on
Common causes
- Faulty oxygen sensor
- Short to voltage in wiring
- Rich fuel mixture
- Contaminated sensor
Diagnostic steps
- Read live O2 sensor voltage
- Inspect wiring for short to voltage
- Check fuel trim values
- Test sensor response
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