P0161low severityPowertrain
O2 Sensor Heater Circuit Bank 2 Sensor 2
on 2013 Volvo C30 2.4L I5 · FWD
What this code means
Malfunction in the downstream O2 sensor heater on Bank 2.
Symptoms
- Check Engine Light
- Failed emissions
Common causes
- Faulty heater
- Blown fuse
- Wiring issue
Diagnostic steps
- Check fuse
- Test heater resistance
- Inspect wiring
Repair notes
Replace sensor.
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