P1647moderate severityPowertrain
Front Heated O2 Sensor Bank 2 Fault
on 2009 Volvo S80 3.2L I6 · AWD
What this code means
The ECM detected a fault in the front (upstream) heated oxygen sensor on Bank 2. The sensor signal or heater circuit is not providing reliable data for fuel trim control.
Symptoms
- Check Engine Light
- Poor fuel economy
- Rough idle on Bank 2
- Failed emissions test
Common causes
- Faulty O2 sensor Bank 2
- O2 sensor heater failure Bank 2
- Exhaust leak at Bank 2 manifold
- Wiring fault to sensor
- Sensor connector corrosion
Diagnostic steps
- Test O2 sensor signal Bank 2
- Test heater circuit resistance
- Check for exhaust leaks at Bank 2
- Inspect wiring and connector
- Compare sensor data between banks
Repair notes
Replace the front heated O2 sensor on Bank 2.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1