PowertrainP1664
CautionSeverity: Caution - get it checked when you can
Write error, random code, in EEPROM
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 |
|---|---|---|---|
| Mercedes-Benz | P1664 | No description available | Powertrain |
| BMW | P1664 | Write error, random code, in EEPROM Brand | Powertrain |
| BYD | P1664 | Hydraulic fluid cooling valve circuit fault Brand | Powertrain |
| Chery | P1664 | Intake manifold Brand | Powertrain |
| Daewoo | P1664 | 1-4 Upshift Lamp Control Circuit Brand | Powertrain |
| DFFS | P1664 | Engine ECU monitoring failure Brand | Powertrain |
| DFXK | P1664 | Control Circuit for PD Injectors: Electrical Malfunction Brand | Powertrain |
| EOBD | P1664 | Ekstravarmer Brand | Powertrain |
| Ford | P1664 | MENU ROOT Brand | Powertrain |
| Geely | P1664 | Control Circuit for PD Injectors: Electrical Malfunction Brand | Powertrain |
| GM | P1664 | 1-4 Upshift Lamp Control Circuit Brand | Powertrain |
| Great Wall | P1664 | Monitoring control communication fault Brand | Powertrain |
| Holden | P1664 | Service Vehicle Soon Indicator Control Circuit Brand | Powertrain |
| Isuzu | P1664 | No description available | Powertrain |
| Land Rover | P1664 | No description available | Powertrain |
| Mahindra | P1664 | No description available | Powertrain |
| Mazda | P1664 | MENU ROOT Brand | Powertrain |
| Opel | P1664 | 1-4 Upshift Lamp Control Circuit Brand | Powertrain |
| Peugeot | P1664 | No description available | Powertrain |
| Porsche | P1664 | Schubumluftventil klemmt offen Brand | Powertrain |
| Saab | P1664 | 1-4 Upshift Lamp Control Circuit Brand | Powertrain |
| Smart | P1664 | No description available | Powertrain |
| Sprinter | P1664 | ENV_ _Datum3 Brand | Powertrain |
| Tata | P1664 | No description available | Powertrain |
| Toyota | P1664 | Engine ECU monitoring failure 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 2
These 7-character codes are manufacturer-specific variants of P1664 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | P166400 | Sensor Nebenaggregate- Kühlwassertemperatur elektrischer Fehler Signalpegel Low Brand | Powertrain |
| Sprinter | P166400 | Sensor Nebenaggregate- Kühlwassertemperatur elektrischer Fehler Signalpegel Low Brand | Powertrain |
6Related codes
Browse Pxxx codes or P166xx codes.