OBD-II code · Powertrain (generic)
P0030 HO2S Heater Control Circuit (Bank 1 Sensor 1)
HO2S Heater Control Circuit (Bank 1 Sensor 1): the control circuit has an electrical fault. The heater brings the oxygen sensor to operating temperature for closed-loop fuel control.
Is it safe to drive with P0030?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyHeater element open or burnt out
- PossibleHeater supply fuse blown
- PossibleWiring or connector fault
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Oxygen Sensor, Oxygen Sensor Heater, Sensor Wiring
Related codes
- P0036HO2S Heater Control Circuit (Bank 1 Sensor 2)
- P0050HO2S Heater Control Circuit (Bank 2 Sensor 1)
- P0056HO2S Heater Control Circuit (Bank 2 Sensor 2)
- P002DB Camshaft Profile Actuator A Control Circuit/Open Bank 2
- P002EB Camshaft Profile Actuator A Control Circuit Low Bank 2
- P002FB Camshaft Profile Actuator A Control Circuit High Bank 2
- P0031HO2S Heater Control Circuit Low (Bank 1 Sensor 1)
- P0032HO2S Heater Control Circuit High (Bank 1 Sensor 1)
- P0033Turbocharger Bypass Valve Control Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.