P0056low severityPowertrain
HO2S Heater Control Circuit Bank 2 Sensor 2
on 2017 Chevrolet Impala 2.5L I4 Ecotec · AWD
What this code means
Malfunction in the heater circuit for the downstream O2 sensor on Bank 2.
Symptoms
- Check Engine Light
- Failed emissions
- Poor catalyst monitoring
Common causes
- Faulty sensor heater
- Blown fuse
- Wiring issue
Diagnostic steps
- Check fuse
- Test heater resistance
- Inspect wiring
Repair notes
Replace O2 sensor or repair wiring.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1