PowertrainP123B
CautionSeverity: Caution - get it checked when you can
Barometric pressure - Turbocharger/supercharger boost correlation - Sensor B
Key terms: Turbocharger: an exhaust-driven fan that pushes extra air into the engine · Supercharger: an engine-driven fan that pushes extra air into the engine · Boost pressure: extra air pressure made by a turbo or supercharger · 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 14
| Brand | Code | Description | System |
|---|---|---|---|
| BYD | P123B | Fuel tank pressure sensor voltage not OK Brand | Powertrain |
| Daewoo | P123B | No description available | Powertrain |
| DFFS | P123B | The turbine water pump is clogged Brand | Powertrain |
| DFXK | P123B | Firing order, injection end time exceeding the limit for cylinder 2 Brand | Powertrain |
| EOBD | P123B | Aktiv luftklap 3 systemfejl Brand | Powertrain |
| GM | P123B | No description available | Powertrain |
| Great Wall | P123B | Firing order, injection end time exceeding the limit for cylinder 2 Brand | Powertrain |
| Holden | P123B | Alternative Fuel Pump Control Circuit Low Voltage Brand | Powertrain |
| Hyundai | P123B | No description available | Powertrain |
| Isuzu | P123B | No description available | Powertrain |
| Land Rover | P123B | Barometric pressure - Turbocharger/supercharger boost correlation - Sensor B Brand | Powertrain |
| Opel | P123B | No description available | Powertrain |
| Peugeot | P123B | No description available | Powertrain |
| Saab | P123B | No description available | 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.
5Related codes
Browse Pxxx codes or P123xx codes.