PowertrainP1503
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 27
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P1503 | Retarder Relay Brand | Powertrain |
| BAIC Motor | P1503 | Main relay output voltage too low, limiting throttle opening Brand | Powertrain |
| BMW | P1503 | Short circuit to negative Brand | Powertrain |
| BYD | P1503 | Read back time out error of LIN bus Brand | Powertrain |
| Chery | P1503 | EBS LIN message readback duration error Brand | Powertrain |
| Daewoo | P1503 | Immobiliser Wrong Signal Brand | Powertrain |
| DFFS | P1503 | LIN bus readback error Brand | Powertrain |
| DFXK | P1503 | Main relay output voltage too low, throttle opening limited Brand | Powertrain |
| EOBD | P1503 | Abikiiruseandur Brand | Powertrain |
| Geely | P1503 | LIN Bus Read-back Error, Probably Lin Bus Short to Ground Brand | Powertrain |
| GM | P1503 | Auxillary Speed Sensor Fault Brand | Powertrain |
| Great Wall | P1503 | Tachometer sensor vehicle speed signal minimum value error Brand | Powertrain |
| Holden | P1503 | Read Back Timeout Error on LIN Bus Brand | Powertrain |
| Hyundai | P1503 | No description available | Powertrain |
| Isuzu | P1503 | No description available | Powertrain |
| Land Rover | P1503 | Auxiliary speed sensor Brand | Powertrain |
| Mahindra | P1503 | No description available | Powertrain |
| Mitsubishi | P1503 | ISC Thrttle LO limit not attaine Brand | Powertrain |
| Nissan | P1503 | No description available | Powertrain |
| Opel | P1503 | Auxillary Speed Sensor Fault Brand | Powertrain |
| Peugeot | P1503 | No description available | Powertrain |
| Porsche | P1503 | No description available | Powertrain |
| Proton | P1503 | ISC Thrttle LO limit not attaine Brand | Powertrain |
| Saab | P1503 | Auxillary Speed Sensor Fault Brand | Powertrain |
| MG (SAIC) | P1503 | LIN Bus-Read Back Time Out Brand | Powertrain |
| Tata | P1503 | Vehicle Speed Sensor " Brand | Powertrain |
| Volkswagen | P1503 | Load signal from alternator term. DF: implausible signal; Defective 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 5
These 7-character codes are manufacturer-specific variants of P1503 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P150300 | The traction system has detected an implausibly long ABS control intervention Brand | Powertrain |
| SsangYong | P150300 | Faulty vehicle speed sensor input Brand | Powertrain |
| SsangYong | P150301 | Lower DC-DC Converter (LDC) error Brand | Powertrain |
| SsangYong | P150302 | Lower DC-DC Converter (LDC) no response Brand | Powertrain |
| SsangYong | P150303 | Lower DC-DC Converter (LDC) target voltage error Brand | Powertrain |
6Related codes
Browse Pxxx codes or P150xx codes.