PowertrainP0030
CautionSeverity: Caution - get it checked when you can
HO2S Heater Control Circuit (Bank 1 Sensor 1)
Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · Bank 1: the side of the engine containing cylinder 1 · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
This code is in the fuel and air metering range, which includes fuel-pressure and camshaft-timing faults.
2Common causes
- Dirty or faulty mass air flow sensor
- Vacuum or intake air leak
- Weak fuel pump or clogged fuel filter
- Faulty fuel injector
- Faulty oxygen sensor
- Wiring or connector fault
3Can I drive?
Have it diagnosed promptly. Some codes in this range affect fuel pressure or camshaft timing; if the engine loses power, runs badly, or stalls, stop safely and get professional help.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 39
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| BAIC Motor | P0030 | Upstream oxygen sensor heater circuit open Brand | Powertrain |
| Mercedes-Benz | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| BMW | P0030 | Load drop Brand | Powertrain |
| BYD | P0030 | HO2S Heater Control Circuit Bank 1 Sensor 1 Brand | Powertrain |
| Chery | P0030 | HO2S Heater control Circuit Brand | Powertrain |
| Daewoo | P0030 | HO2S Heater Control Circuit Bank 1 Sensor 1 Brand | Powertrain |
| Daihatsu | P0030 | O2 (A/F) sensor heater system B1S1 Brand | Powertrain |
| DFFS | P0030 | Lost communication with sunroof ECU Brand | Powertrain |
| DFFX | P0030 | upstream oxygen sensor heater open circuit Brand | Powertrain |
| DFXK | P0030 | O2 sensor heating drive circuit open Brand | Powertrain |
| EOBD | P0030 | HO2S varmekreds styring bank 1 sensor 1 Brand | Powertrain |
| Geely | P0030 | Downstream O2 sensor circuit signal fault Brand | Powertrain |
| GM | P0030 | HO2S Heater Control Circuit Bank 1 Sensor 1 Brand | Powertrain |
| Great Wall | P0030 | Upstream O2 Sensor Heater Fault Brand | Powertrain |
| Hafei | P0030 | HO2S Heater Control Circuit Bank 1 Sensor 1 Brand | Powertrain |
| Holden | P0030 | HO2S Heater Control Circuit Sensor 1 Brand | Powertrain |
| Honda | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| Hyundai | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| Isuzu | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| Land Rover | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| Maserati | P0030 | Oxygen sensor heater circuit (bank 1 sensor 1) Brand | Powertrain |
| Mitsubishi | P0030 | O2S/LAFS(front) heater Brand | Powertrain |
| Nissan | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| Opel | P0030 | HO2S Heater Control Circuit Bank 1 Sensor 1 Brand | Powertrain |
| Perodua | P0030 | O2 (A/F) sensor heater system B1S1 Brand | Powertrain |
| Peugeot | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| Porsche | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| Proton | P0030 | O2S/LAFS(front) heater Brand | Powertrain |
| Saab | P0030 | HO2S Heater Control Circuit Bank 1 Sensor 1 Brand | Powertrain |
| MG (SAIC) | P0030 | HO2S Heater Control Circuit Bank 1 Sensor 1 Brand | Powertrain |
| Smart | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| Sprinter | P0030 | HO2S Heater Control Circuit (Bank 1 Sensor 1) SAE | Powertrain |
| Subaru | P0030 | O2 Sensor Heater Circuit Range/Performance Brand | Powertrain |
| Suzuki | P0030 | HO2S Heater Control Circuit Bank 1 Sensor 1 Brand | Powertrain |
| SWM Motor | P0030 | upstream oxygen sensor heating control circuit open circuit Brand | Powertrain |
| Tata | P0030 | HO2S Heater Control Circuit Bank 1 Sensor 1 Brand | Powertrain |
| Toyota | P0030 | Upstream oxygen sensor heater circuit open Brand | Powertrain |
| Volkswagen | P0030 | Oxygen (Lambda) Sensor Heating Circuit: B1 S1: Malfunction / Open Circuit Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 6
These 7-character codes are manufacturer-specific variants of P0030 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P003000 | No description available | Powertrain |
| Sprinter | P003000 | No description available | Powertrain |
| SsangYong | P003000 | HO2S heater control circuit (bank 1 / sensor 1) Brand | Powertrain |
| Mercedes-Benz | P003013 | No description available | Powertrain |
| Mercedes-Benz | P003062 | No description available | Powertrain |
| Smart | P003062 | No description available | Powertrain |
6Related codes
Browse Pxxx codes or P003xx codes.