Powertrain
generic / SAE
P0057
HO2S Heater Control Circuit Low (Bank 2 Sensor 2)
The heater control line for the upstream bank 2 oxygen sensor reads below the expected voltage, typical of a short to ground or low driver current.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 57
Possible causes
- Heater wire shorted to ground high
- Connector pins corroded - high contact resistance low
- Harness chafing through insulation low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 80–350 €
- Estimated time: 0.5–1.5 h
- Component: oxygen sensor heater
- Component: sensor wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012