HO2S Heater Control Circuit Bank 1 Sensor 2
2020-2024 Citroën C4 Electric 🇩🇪
Description
The PCM detected a malfunction in the heater circuit of the downstream heated oxygen sensor (Bank 1, Sensor 2).
Symptoms
- Check Engine Light
- Failed emissions test
- Poor catalyst monitoring
Common Causes
- Faulty O2 sensor heater
- Blown fuse
- Wiring issue
Diagnostic Steps
- Check fuse
- Test heater resistance
- Inspect wiring
- Check PCM output
Repair Notes
Replace downstream O2 sensor or repair wiring.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0036 on Other Vehicles
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2018-2024 1.2L I3 PureTech
Citroën Berlingo
2018-2024 1.5L I4 BlueHDi
Citroën Berlingo
2018-2025 1.2L I3 Turbo PureTech 110
Citroën Berlingo III FR
2018-2025 1.2L I3 Turbo PureTech 110
Citroën C1 III
2014-2022 1.0L I3 VTi 72
Citroën C1 III
2014-2022 1.2L I3 PureTech 82
Citroën C3
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Citroën C3
2016-2024 1.5L I4 BlueHDi
Common Questions
What does code P0036 mean on a 2020-2024 Citroën C4?
P0036 stands for "HO2S Heater Control Circuit Bank 1 Sensor 2". The PCM detected a malfunction in the heater circuit of the downstream heated oxygen sensor (Bank 1, Sensor 2).
What are the symptoms of P0036 on a Citroën C4?
Common symptoms of P0036 include: Check Engine Light, Failed emissions test, Poor catalyst monitoring.
What causes P0036 on a 2020-2024 Citroën C4?
Common causes of P0036 include: Faulty O2 sensor heater, Blown fuse, Wiring issue.