PowertrainP1856
CautionSeverity: Caution - get it checked when you can
Short circuit to positive
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 19
| Brand | Code | Description | System |
|---|---|---|---|
| BAIC Motor | P1856 | A/C system EAS self-test fault Brand | Powertrain |
| Mercedes-Benz | P1856 | No description available | Powertrain |
| BMW | P1856 | Short circuit to positive Brand | Powertrain |
| Chery | P1856 | Vehicle controller battery voltage too high Brand | Powertrain |
| Daewoo | P1856 | Throttle/Pedal Pos.Sensor A Circ. Error Message from Engine Contr Brand | Powertrain |
| DFXK | P1856 | Throttle Potentiometer (G69): Error Message from ECU Brand | Powertrain |
| EOBD | P1856 | Posun bubna #2 prevodovky 2 Brand | Powertrain |
| Geely | P1856 | Throttle Potentiometer (G69): Error Message from ECU Brand | Powertrain |
| GM | P1856 | Throttle/Pedal Pos.Sensor A Circ. Error Message from Engine Contr Brand | Powertrain |
| Honda | P1856 | No description available | Powertrain |
| Land Rover | P1856 | Transfer case contact plate C - short circuit to battery Brand | Powertrain |
| Mitsubishi | P1856 | No description available | Powertrain |
| Peugeot | P1856 | No description available | Powertrain |
| Proton | P1856 | Gearbox shift drum#2 movement 2 Brand | Powertrain |
| Saab | P1856 | Throttle/Pedal Pos.Sensor A Circ. Error Message from Engine Contr Brand | Powertrain |
| Smart | P1856 | No description available | Powertrain |
| Sprinter | P1856 | No description available | Powertrain |
| SsangYong | P1856 | When you see the DTC code, which is (54) Lever Position Sensor Not Calibrated Brand | Powertrain |
| Suzuki | P1856 | Clutch Position Sensor 'B' Circuit Low 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 P1856 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P185600 | BstCtlSlwResp: DFC for monitoring the slow response behaviour of the boost control system Brand | Powertrain |
| Sprinter | P185600 | BstCtlSlwResp: DFC for monitoring the slow response behaviour of the boost control system Brand | Powertrain |
6Related codes
Browse Pxxx codes or P185xx codes.