Powertrain
generic / SAE
P0056
HO2S Heater Control Circuit (Bank 2 Sensor 2)
HO2S Heater Control Circuit (Bank 2 Sensor 2): the control circuit has an electrical fault. The heater brings the oxygen sensor to operating temperature for closed-loop fuel control.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 56
Possible causes
- Heater element open high
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 80–350 €
- Estimated time: 0.5–1.5 h
- Component: oxygen sensor
- Component: oxygen sensor heater
- Component: sensor wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012