Powertrain
generic / SAE
P0030
HO2S Heater Control Circuit (Bank 1 Sensor 1)
Generic electrical fault in the heater circuit of the upstream oxygen sensor on bank 1. The ECU monitors the heater current and resistance to ensure the sensor reaches operating temperature for closed-loop fueling.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 30
Possible causes
- Heater element open or burnt out high
- Heater supply fuse blown medium
- Wiring or connector fault medium
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