P0162moderate severityPowertrain
O2 Sensor Circuit Malfunction (Bank 2 Sensor 3)
on 2011 Audi Q7 3.0L Supercharged V6 · AWD
What this code means
The PCM detects a general fault in the oxygen sensor circuit for bank 2, sensor 3. This sensor monitors exhaust downstream of the catalytic converter.
Symptoms
- Check engine light on
- Reduced fuel economy
- Failed emissions test
Common causes
- Faulty oxygen sensor
- Damaged wiring or connector
- Exhaust leak near sensor
- Faulty PCM
Diagnostic steps
- Scan for stored codes and freeze frame
- Inspect O2 sensor wiring and connector
- Check sensor voltage with scan tool
- Replace oxygen sensor if faulty
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