PowertrainP1851
CautionSeverity: Caution - get it checked when you can
Short circuit to negative
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 23
| Brand | Code | Description | System |
|---|---|---|---|
| BAIC Motor | P1851 | Gearbox adaptation wheel 2 failed to return empty Brand | Powertrain |
| BMW | P1851 | Short circuit to negative Brand | Powertrain |
| Chery | P1851 | Vehicle controller Serial Peripheral Interface (SPI) fault Brand | Powertrain |
| Daewoo | P1851 | Brake Band Apply Solenoid Performance Brand | Powertrain |
| DFXK | P1851 | Powertrain Data Bus: Missing Message from ABS Controller Brand | Powertrain |
| EOBD | P1851 | Indikatorsignal Brand | Powertrain |
| Ford | P1851 | No description available | Powertrain |
| Geely | P1851 | Powertrain Data Bus: Missing Message from ABS Controller Brand | Powertrain |
| GM | P1851 | Brake Band Apply Solenoid Performance Brand | Powertrain |
| Holden | P1851 | Valve Body Temperature Brand | Powertrain |
| Honda | P1851 | No description available | Powertrain |
| Land Rover | P1851 | Transfer Case Contact Plate 'B' Open Circuit Brand | Powertrain |
| Mazda | P1851 | No description available | Powertrain |
| Mitsubishi | P1851 | No description available | Powertrain |
| Opel | P1851 | Brake Band Apply Solenoid Performance Brand | Powertrain |
| Peugeot | P1851 | No description available | Powertrain |
| Proton | P1851 | Gearbox shift drum#1 movement 2 Brand | Powertrain |
| Saab | P1851 | Bremsband Anwende-MV Leistung Brand | Powertrain |
| MG (SAIC) | P1851 | Short to Ground for Position encoder 1 Brand | Powertrain |
| Smart | P1851 | No description available | Powertrain |
| Suzuki | P1851 | Gear Shift Even Actuator Circuit Brand | Powertrain |
| Toyota | P1851 | Data bus powertrain missing message from brake control Brand | Powertrain |
| Volkswagen | P1851 | Drive train data bus, no message from ABS CU 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 2
These 7-character codes are manufacturer-specific variants of P1851 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | P185100 | Short to ground for position encoder 1 Brand | Powertrain |
| Mercedes-Benz | P185162 | Der Schalter 'Notfallberbrckungssytem' hat Funktionsstörung. Brand | Powertrain |
6Related codes
Browse Pxxx codes or P185xx codes.