PowertrainP2243
CautionSeverity: Caution - get it checked when you can
Upstream oxygen sensor reference voltage circuit open
Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Control module: a small computer that runs one part of the car · Powertrain: engine, transmission and emissions
1What it means in plain English
The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.
2Common causes
- Sensor or actuator fault
- Wiring or connector fault
- Vacuum or intake leak
- Fuel or ignition problem
- Control module fault
3Can I drive?
Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.
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 34
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P2243 | No description available | Powertrain |
| BAIC Motor | P2243 | O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 Brand | Powertrain |
| Mercedes-Benz | P2243 | No description available | Powertrain |
| BYD | P2243 | O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 Brand | Powertrain |
| Chery | P2243 | Oxygen sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 Brand | Powertrain |
| Daewoo | P2243 | O2 Sensor Circuit Range/Performance Brand | Powertrain |
| DFFS | P2243 | The upstream oxygen sensor signal open circuit Brand | Powertrain |
| DFFX | P2243 | The upstream oxygen sensor line is open Brand | Powertrain |
| DFXK | P2243 | O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 Brand | Powertrain |
| EOBD | P2243 | Hapnikusensori viitepinge ahel/avatud panga 1 sensor 1 Brand | Powertrain |
| Geely | P2243 | O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 Brand | Powertrain |
| GM | P2243 | HO2S reference voltage circuit bank 1 sensor 1 Brand | Powertrain |
| Great Wall | P2243 | O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 Brand | Powertrain |
| Hafei | P2243 | O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 Brand | Powertrain |
| Holden | P2243 | HO2S Reference Voltage Circuit Sensor 1 Brand | Powertrain |
| Honda | P2243 | No description available | Powertrain |
| Hyundai | P2243 | No description available | Powertrain |
| Isuzu | P2243 | No description available | Powertrain |
| Land Rover | P2243 | No description available | Powertrain |
| Mahindra | P2243 | No description available | Powertrain |
| Maserati | P2243 | Oxygen sensor reference voltage circuit/open (bank 1 sensor 1) Brand | Powertrain |
| Mitsubishi | P2243 | O2S/LAFS(front) ref. volt. open Brand | Powertrain |
| Opel | P2243 | Procedure aborted. DTC 00 is not present Brand | Powertrain |
| Peugeot | P2243 | Procedure aborted. DTC 00 is not present Brand | Powertrain |
| Porsche | P2243 | No description available | Powertrain |
| Proton | P2243 | O2S/LAFS(front) ref. volt. open Brand | Powertrain |
| Saab | P2243 | HO2S Reference Voltage Circuit Bank 1 Sensor 1 Brand | Powertrain |
| MG (SAIC) | P2243 | O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 Brand | Powertrain |
| Smart | P2243 | No description available | Powertrain |
| Sprinter | P2243 | No description available | Powertrain |
| Suzuki | P2243 | O2 Sensor Reference Voltage Circuit / Open (Bank1 Sensor1) Brand | Powertrain |
| Tata | P2243 | Oxygen Sensor Reference Circuit - Bank 1 - Sensor 1 Brand | Powertrain |
| Toyota | P2243 | Upstream oxygen sensor reference voltage circuit open Brand | Powertrain |
| Volkswagen | P2243 | Oxygen (Lambda) sensor B1 S1: reference voltage open circuit; Short to plus 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 7
These 7-character codes are manufacturer-specific variants of P2243 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P224300 | Der Anschluss der Referenzspannung der Lambdasonde 1 (Zylinderreihe 1) hat einen elektrischen Fehler oder Unterbrechung. Brand | Powertrain |
| SsangYong | P224300 | Front O2 Sensor Reference Voltage Open Circuit Brand | Powertrain |
| SsangYong | P224313 | WRAF open circuit failure on un during the Ramp up Brand | Powertrain |
| SsangYong | P224315 | WRAF open circuit failure on un Brand | Powertrain |
| Mercedes-Benz | P22431C | Der Anschluss der Referenzspannung der Lambdasonde 1 (Zylinderreihe 1) hat einen elektrischen Fehler oder Unterbrechung. Spannungswert liegt außerhalb des zulässigen Bereiches. Brand | Powertrain |
| Mercedes-Benz | P224392 | Der Anschluss der Referenzspannung der Lambdasonde 1 (Zylinderreihe 1) hat einen elektrischen Fehler oder Unterbrechung. Die Funktion oder die Anweisung ist fehlerhaft. Brand | Powertrain |
| Sprinter | P224392 | Der Anschluss der Referenzspannung der Lambdasonde 1 (Zylinderreihe 1) hat einen elektrischen Fehler oder Unterbrechung. Die Funktion oder die Anweisung ist fehlerhaft. Brand | Powertrain |
6Related codes
Browse Pxxx codes or P224xx codes.