PowertrainP1540
CautionSeverity: Caution - get it checked when you can
Vehicle speed sensor high input
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 25
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P1540 | No description available | Powertrain |
| BAIC Motor | P1540 | Reverse (R) gear speed limit failure Brand | Powertrain |
| Chery | P1540 | Vehicle Speed Signal: Signal too High Brand | Powertrain |
| Daewoo | P1540 | ABV System Fault Brand | Powertrain |
| Daihatsu | P1540 | Brake negative pressure sensor fault Brand | Powertrain |
| DFXK | P1540 | Vehicle Speed Signal: Signal too High Brand | Powertrain |
| EOBD | P1540 | A/C-trykk Brand | Powertrain |
| Geely | P1540 | Hydraulic inlet Gas System Fault Brand | Powertrain |
| GM | P1540 | ABV System Fault Brand | Powertrain |
| Holden | P1540 | Invalid Data Received From HVAC Control Module Brand | Powertrain |
| Hyundai | P1540 | No description available | Powertrain |
| Isuzu | P1540 | No description available | Powertrain |
| Land Rover | P1540 | Air bypass valve circuit Brand | Powertrain |
| Maserati | P1540 | No description available | Powertrain |
| Mitsubishi | P1540 | Radiator sensor1 LIN comm Brand | Powertrain |
| Opel | P1540 | ABV System Fault Brand | Powertrain |
| Perodua | P1540 | Brake negative pressure sensor fault Brand | Powertrain |
| Peugeot | P1540 | No description available | Powertrain |
| Porsche | P1540 | No description available | Powertrain |
| Proton | P1540 | Radiator sensor1 LIN comm Brand | Powertrain |
| Saab | P1540 | ABV System Fault Brand | Powertrain |
| Subaru | P1540 | Vehicle Speed Sensor Malfunction at Low Speed Brand | Powertrain |
| Suzuki | P1540 | VDOP Solenoid Valve Circuit Range / Performance Brand | Powertrain |
| Tata | P1540 | Air Conditioning Relay Control - Open Circuit Brand | Powertrain |
| Toyota | P1540 | Vehicle speed sensor high input 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 P1540 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | P154000 | Air conditioner operating circuit fault - open Brand | Powertrain |
6Related codes
Browse Pxxx codes or P154xx codes.