PowertrainP1840
CautionSeverity: Caution - get it checked when you can
Transfer case shift motor circuit short to battery
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 27
| Brand | Code | Description | System |
|---|---|---|---|
| BAIC Motor | P1840 | Single reduction gear unit parking fault Brand | Powertrain |
| Mercedes-Benz | P1840 | No description available | Powertrain |
| BYD | P1840 | Shift solenoid GND to short Brand | Powertrain |
| Chery | P1840 | Motor controller fault Brand | Powertrain |
| Daewoo | P1840 | EDS3 Output Circuit Voltage High Brand | Powertrain |
| DFFX | P1840 | Shift solenoid GND to short Brand | Powertrain |
| DFXK | P1840 | Pressure Control Valve 6 (N371): Short to Plus Brand | Powertrain |
| EOBD | P1840 | Kunci awal Brand | Powertrain |
| Geely | P1840 | Shift solenoid GND to short Brand | Powertrain |
| GM | P1840 | Transmission Transfer Case Shift Motor Short Circuit To Battery Brand | Powertrain |
| Great Wall | P1840 | Shift solenoid GND to short Brand | Powertrain |
| Hafei | P1840 | Shift solenoid GND to short Brand | Powertrain |
| Holden | P1840 | Input Speed Sensor Circuit High Voltage Brand | Powertrain |
| Honda | P1840 | No description available | Powertrain |
| Land Rover | P1840 | CAN bus malfunction Brand | Powertrain |
| Mitsubishi | P1840 | Speed of power axle Brand | Powertrain |
| Opel | P1840 | Transmission Transfer Case Shift Motor Short Circuit To Battery Brand | Powertrain |
| Peugeot | P1840 | No description available | Powertrain |
| Porsche | P1840 | No description available | Powertrain |
| Proton | P1840 | Speed of power axle Brand | Powertrain |
| Saab | P1840 | Transmission Transfer Case Shift Motor Short Circuit To Battery Brand | Powertrain |
| MG (SAIC) | P1840 | Clutch Speed Sensor Circuit High Brand | Powertrain |
| Smart | P1840 | Frequency Counter Brand | Powertrain |
| Sprinter | P1840 | No description available | Powertrain |
| Subaru | P1840 | Transmission Fluid Pressure Sensor Switch A Circuit Brand | Powertrain |
| Suzuki | P1840 | TCM System Voltage Brand | Powertrain |
| Toyota | P1840 | Transfer case shift motor circuit short to battery 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.
5Related codes
Browse Pxxx codes or P184xx codes.