PowertrainP1256
CautionSeverity: Caution - get it checked when you can
Contactor forced disconnection
Key terms: 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 29
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P1256 | Seat Control Module.'B'. - Incorrect Or Unreliable Data Brand | Powertrain |
| BAIC Motor | P1256 | oil inlet control valve oil pressure control failed Brand | Powertrain |
| BYD | P1256 | Linear oxygen sensor circuit fault Brand | Powertrain |
| Chery | P1256 | Cylinder 3 injector power-up duration below lower limit Brand | Powertrain |
| Daewoo | P1256 | Pedal Correlation PDS1 and HPDS Brand | Powertrain |
| Daihatsu | P1256 | VN turbo open side abnormal Brand | Powertrain |
| DFFS | P1256 | Forced contact hole fault Brand | Powertrain |
| DFXK | P1256 | Engine Coolant Temp Sensor (G62): Open or Short to Plus Brand | Powertrain |
| EOBD | P1256 | Eropaineanturi Brand | Powertrain |
| Ford | P1256 | No description available | Powertrain |
| Geely | P1256 | Engine Coolant Temp Sensor (G62): Open or Short to Plus Brand | Powertrain |
| GM | P1256 | Pedal Correlation PDS1 and HPDS Brand | Powertrain |
| Great Wall | P1256 | Firing order cylinder 3 electrification time and minimum value comparison fault status Brand | Powertrain |
| Hafei | P1256 | Common rail pressure M/Vl Brand | Powertrain |
| Holden | P1256 | Turbocharger Boost Pressure Not Detected - Mechanical Brand | Powertrain |
| Isuzu | P1256 | No description available | Powertrain |
| Land Rover | P1256 | Pedal correlation - Pedal demand sensor 11- High pedal demand sensor Brand | Powertrain |
| Mahindra | P1256 | No description available | Powertrain |
| Mazda | P1256 | No description available | Powertrain |
| Mitsubishi | P1256 | Common rail pressure M/Vl Brand | Powertrain |
| Opel | P1256 | Pedal Correlation PDS1 and HPDS Brand | Powertrain |
| Perodua | P1256 | VN turbo open side abnormal Brand | Powertrain |
| Peugeot | P1256 | No description available | Powertrain |
| Porsche | P1256 | No description available | Powertrain |
| Proton | P1256 | Common rail pressure M/Vl Brand | Powertrain |
| Saab | P1256 | Pedal Correlation PDS1 and HPDS Brand | Powertrain |
| Tata | P1256 | Rail Pressure Control - Trim Low And Flow Low Brand | Powertrain |
| Toyota | P1256 | Contactor forced disconnection Brand | Powertrain |
| Volkswagen | P1256 | Engine Coolant Temperature Circuit (G62): Open / Short to B+ 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 1
These 7-character codes are manufacturer-specific variants of P1256 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | P125600 | Pressure regulation: min trim (rail pressure gouvernor) in low fuel condition Brand | Powertrain |
6Related codes
Browse Pxxx codes or P125xx codes.