PowertrainP0155
InfoSeverity: Info - usually nothing urgent
O2 Sensor Heater Circuit (Bank 2 Sensor 1)
Key terms: Catalytic converter: cleans the exhaust gases · Oxygen sensor: measures oxygen in the exhaust gas · Control module: a small computer that runs one part of the car · Bank 2: the side of the engine containing cylinder 2 · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions
1What it means in plain English
The heater inside the oxygen sensor before the catalytic converter on the second bank of cylinders is not working.
2Common causes
- Faulty oxygen sensor heater
- Blown fuse
- Damaged wiring or connector
- Corroded connector
- Engine control module fault
3Can I drive?
Usually safe to drive. Emissions and fuel economy may be slightly worse until it is fixed.
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 41
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P0155 | Hybrid Battery. Voltage Sensor. (Sensor C.) - Low Signal Brand | Powertrain |
| BAIC Motor | P0155 | O2 Sensor Heater Circuit Bank 2 Sensor 1 Brand | Powertrain |
| Mercedes-Benz | P0155 | O2 Sensor Heater Circuit (Bank 2 Sensor 1) SAE | Powertrain |
| BMW | P0155 | Sensor heater faulty Brand | Powertrain |
| BYD | P0155 | Oxygen sensor heater Brand | Powertrain |
| Chery | P0155 | Oxygen sensor heater Brand | Powertrain |
| Chrysler | P0155 | Oxygen sensor 2/1 heater circuit low Brand | Powertrain |
| Daewoo | P0155 | O2 Sensor Heater Circuit Bank 2 Sensor 1 Brand | Powertrain |
| Daihatsu | P0155 | O2 sensor heater system B2S1 Brand | Powertrain |
| DFFS | P0155 | O2 Sensor Heater Circuit Bank 2 Sensor 1 Brand | Powertrain |
| DFFX | P0155 | Oxygen sensor heater Brand | Powertrain |
| DFXK | P0155 | O2 Sensor Heater Circuit Bank 2 Sensor 1 Brand | Powertrain |
| EOBD | P0155 | Syresensor värmekrets bank 2 sensor 1 Brand | Powertrain |
| Fiat | P0155 | Lost communication with cluster/CCN Brand | Powertrain |
| Ford | P0155 | O2 Sensor Heater Circuit (Bank 2 Sensor 1) SAE | Powertrain |
| Geely | P0155 | Oxygen sensor heater Brand | Powertrain |
| GM | P0155 | HO2S heater performance bank 2 sensor 1 Brand | Powertrain |
| Great Wall | P0155 | Oxygen sensor heater Brand | Powertrain |
| Hafei | P0155 | Oxygen sensor heater Brand | Powertrain |
| Holden | P0155 | HO2S Heater Performance Bank 2 Sensor 1 Brand | Powertrain |
| Honda | P0155 | P0135/ /P1717/HO2S S2 FreezeData update Brand | Powertrain |
| Hyundai | P0155 | O2 Sensor Heater Circuit (Bank 2 Sensor 1) SAE | Powertrain |
| Isuzu | P0155 | O2 Sensor Heater Circuit (Bank 2 Sensor 1) SAE | Powertrain |
| Land Rover | P0155 | O2 Sensor Heater Circuit (Bank 2 Sensor 1) SAE | Powertrain |
| Maserati | P0155 | Lost Communication With Cluster/CCN Brand | Powertrain |
| Mazda | P0155 | O2 Sensor Heater Circuit (Bank 2 Sensor 1) SAE | Powertrain |
| Mitsubishi | P0155 | Oxygen sensor2 Brand | Powertrain |
| Nissan | P0155 | Heated oxygen sensor 1 heater Brand | Powertrain |
| Opel | P0155 | HO2S heater performance bank 2 sensor 1 Brand | Powertrain |
| Perodua | P0155 | O2 sensor heater system B2S1 Brand | Powertrain |
| Peugeot | P0155 | O2 Sensor Heater Circuit (Bank 2 Sensor 1) SAE | Powertrain |
| Porsche | P0155 | Heizung LSU Bank 2 Brand | Powertrain |
| Proton | P0155 | Oxygen sensor2 Brand | Powertrain |
| Saab | P0155 | HO2S heater performance bank 2 sensor 1 Brand | Powertrain |
| MG (SAIC) | P0155 | O2 Sensor Heater Circuit Bank 2 Sensor 1 Brand | Powertrain |
| Smart | P0155 | O2 Sensor Heater Circuit (Bank 2 Sensor 1) SAE | Powertrain |
| Sprinter | P0155 | O2 Sensor Heater Circuit (Bank 2 Sensor 1) SAE | Powertrain |
| Suzuki | P0155 | O2 sensor heater circuit malfunction(Bank2-Sensor1) Brand | Powertrain |
| Tata | P0155 | O2 Sensor Heater Circuit Bank 2 Sensor 1 Brand | Powertrain |
| Toyota | P0155 | Coolant temperature information is invalid Brand | Powertrain |
| Volkswagen | P0155 | heating circuit: malfunction 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 5
These 7-character codes are manufacturer-specific variants of P0155 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | P015501 | No.3 Oxygen sensor heater - short circuit to B+ Brand | Powertrain |
| SsangYong | P015502 | No.3 Oxygen sensor heater - open or short circuit to ground Brand | Powertrain |
| SsangYong | P015503 | No.3 Oxygen sensor - faulty heating current Brand | Powertrain |
| Mercedes-Benz | P015504 | The heater of oxygen sensor 1 (cylinder bank 2) has an electrical fault. There is an internal fault. Brand | Powertrain |
| Mercedes-Benz | P015584 | Die Heizung der Lambdasonde 1 (Zylinderreihe 2) hat einen elektrischen Fehler. Es liegt ein Signal unterhalb des zulässigen Grenzwertes. Brand | Powertrain |
6Related codes
Browse Pxxx codes or P015xx codes.