PowertrainP1684
CautionSeverity: Caution - get it checked when you can
Driver 5 Line 4
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 28
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P1684 | No description available | Powertrain |
| BYD | P1684 | EV2 gear not in place Brand | Powertrain |
| Chery | P1684 | Control Unit Programming: Communications Error Brand | Powertrain |
| Chrysler | P1684 | Battery Was Disconnected Brand | Powertrain |
| Daewoo | P1684 | Driver 5 Line 4 Brand | Powertrain |
| DFXK | P1684 | Variable intake swirl valve (VSA) current limited Brand | Powertrain |
| EOBD | P1684 | Juht 5 rida 4 Brand | Powertrain |
| Fiat | P1684 | Battery was disconnected Brand | Powertrain |
| Ford | P1684 | No description available | Powertrain |
| Geely | P1684 | Control Unit Programming: Communications Error Brand | Powertrain |
| GM | P1684 | Driver 5 Line 4 Brand | Powertrain |
| Great Wall | P1684 | Swirl valve current limited Brand | Powertrain |
| Holden | P1684 | Throttle Actuator Control (TAC) Motor Control Circuit Brand | Powertrain |
| Honda | P1684 | No description available | Powertrain |
| Isuzu | P1684 | No description available | Powertrain |
| Land Rover | P1684 | Metering oil pump position sensor circuit Brand | Powertrain |
| Maserati | P1684 | No description available | Powertrain |
| Mazda | P1684 | No description available | Powertrain |
| Mitsubishi | P1684 | Limp home position Brand | Powertrain |
| Opel | P1684 | Driver 5 Line 4 Brand | Powertrain |
| Peugeot | P1684 | No description available | Powertrain |
| Porsche | P1684 | Endstufe Klimaluefter min Brand | Powertrain |
| Proton | P1684 | Limp home position Brand | Powertrain |
| Saab | P1684 | Driver 5 Line 4 Brand | Powertrain |
| MG (SAIC) | P1684 | Driver Signal PWM wrong *8 Brand | Powertrain |
| Sprinter | P1684 | No description available | Powertrain |
| Suzuki | P1684 | No description available | Powertrain |
| Tata | P1684 | No description available | 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 P1684 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P168400 | OBD Starter Control Unit Fehler 6 Brand | Powertrain |
| Sprinter | P168400 | OBD Starter Control Unit Fehler 6 Brand | Powertrain |
| SsangYong | P168400 | Glow plug controller fault Brand | Powertrain |
6Related codes
Browse Pxxx codes or P168xx codes.