OBD-II code · Powertrain (generic)
P0036 HO2S Heater Control Circuit (Bank 1 Sensor 2)
HO2S Heater Control Circuit (Bank 1 Sensor 2): 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 P0036?
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
- PossibleHeater fuse blown
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
- P0030HO2S Heater Control Circuit (Bank 1 Sensor 1)
- P0050HO2S Heater Control Circuit (Bank 2 Sensor 1)
- P0056HO2S Heater Control Circuit (Bank 2 Sensor 2)
- P0033Turbocharger Bypass Valve Control Circuit
- P0034Turbocharger Bypass Valve Control Circuit Low
- P0035Turbocharger Bypass Valve Control Circuit High
- P0037HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
- P0038HO2S Heater Control Circuit High (Bank 1 Sensor 2)
- P0039Turbocharger/Supercharger Bypass Valve A Control Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.