P0030
HO2S Heater Control Circuit Bank 1 Sensor 1
2019-2024 BMW 3 Series G20 2.0L I4 Turbo B48
Low SeverityPowertrainGeneric (SAE)
Description
The PCM detected a malfunction in the heater circuit of the upstream heated oxygen sensor (Bank 1, Sensor 1).
Symptoms
- Check Engine Light
- Poor fuel economy
- Longer warmup emissions
- Failed emissions test
Common Causes
- Faulty O2 sensor heater
- Blown fuse
- Wiring issue
- PCM heater driver failure
Diagnostic Steps
- Check O2 sensor heater fuse
- Test heater circuit resistance (should be 2-30 ohms)
- Inspect wiring to sensor
- Check PCM heater control output
Repair Notes
Replace O2 sensor if heater resistance is out of spec. Check fuse and wiring first.
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
P0030 on Other Vehicles
Common Questions
What does code P0030 mean on a 2019-2024 BMW 3 Series G20?
P0030 stands for "HO2S Heater Control Circuit Bank 1 Sensor 1". The PCM detected a malfunction in the heater circuit of the upstream heated oxygen sensor (Bank 1, Sensor 1).
What are the symptoms of P0030 on a BMW 3 Series G20?
Common symptoms of P0030 include: Check Engine Light, Poor fuel economy, Longer warmup emissions, Failed emissions test.
What causes P0030 on a 2019-2024 BMW 3 Series G20?
Common causes of P0030 include: Faulty O2 sensor heater, Blown fuse, Wiring issue, PCM heater driver failure.