PowertrainP1603
CautionSeverity: Caution - get it checked when you can
Function monitoring, torque comparison
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 35
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P1603 | No description available | Powertrain |
| BAIC Motor | P1603 | ECU processor fault Brand | Powertrain |
| Mercedes-Benz | P1603 | No description available | Powertrain |
| BMW | P1603 | Function monitoring, torque comparison Brand | Powertrain |
| BYD | P1603 | Battery backup line Brand | Powertrain |
| Chery | P1603 | Battery backup line Brand | Powertrain |
| Daewoo | P1603 | EEPROM Malfunction Brand | Powertrain |
| Daihatsu | P1603 | Engine stall detection Brand | Powertrain |
| DFFS | P1603 | No description available | Powertrain |
| DFFX | P1603 | Battery backup line Brand | Powertrain |
| DFXK | P1603 | ECU processor fault Brand | Powertrain |
| EOBD | P1603 | EEPROM-fel Brand | Powertrain |
| Geely | P1603 | Battery backup line Brand | Powertrain |
| GM | P1603 | EEPROM Malfunction Brand | Powertrain |
| Great Wall | P1603 | Battery backup line Brand | Powertrain |
| Hafei | P1603 | Battery backup line Brand | Powertrain |
| Holden | P1603 | No description available | Powertrain |
| Hyundai | P1603 | No description available | Powertrain |
| Isuzu | P1603 | No description available | Powertrain |
| Land Rover | P1603 | Transmission control module checksum incorrect Brand | Powertrain |
| Mahindra | P1603 | No description available | Powertrain |
| Mitsubishi | P1603 | Battery backup line Brand | Powertrain |
| Perodua | P1603 | Engine stall detection Brand | Powertrain |
| Peugeot | P1603 | No description available | Powertrain |
| Porsche | P1603 | No description available | Powertrain |
| Proton | P1603 | Battery backup line Brand | Powertrain |
| Saab | P1603 | EEPROM Malfunction Brand | Powertrain |
| MG (SAIC) | P1603 | OPST PWM wrong(EOP Driver send OPST With wrong PWM or duty)*8 Brand | Powertrain |
| Smart | P1603 | No description available | Powertrain |
| Sprinter | P1603 | No description available | Powertrain |
| Subaru | P1603 | No description available | Powertrain |
| Suzuki | P1603 | CAN Invalid Data From Other ECU(s) Brand | Powertrain |
| Tata | P1603 | ECU Memory Integrity Fault Brand | Powertrain |
| Toyota | P1603 | Internal control module malfunction Brand | Powertrain |
| Volkswagen | P1603 | Internal control module: failed self-test; Open circuit 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 3
These 7-character codes are manufacturer-specific variants of P1603 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P160300 | Sensor Kühlwassertemperatur elektrischer Fehler Signalpegel Low Brand | Powertrain |
| SsangYong | P160300 | PCAN bus off Brand | Powertrain |
| Volkswagen | P160300 | Fault Control unit defective Brand | Powertrain |
6Related codes
Browse Pxxx codes or P160xx codes.