NetworkU1700
SeriousSeverity: Serious - have it checked soon
SCU message lost
Key terms: Control module: a small computer that runs one part of the car
1What it means in plain English
Control modules in the car cannot communicate with each other over the vehicle network.
2Common causes
- Wiring or connector fault on the communication bus
- Faulty control module
- Low battery voltage or poor ground
- Water ingress in a connector or module
- Aftermarket device interfering with the bus
3Can I drive?
The car may run normally or may not run at all. If the module that has lost communication controls steering, brakes, park brake, charging or engine cooling, drive only if those systems feel normal; stop safely if the steering becomes heavy, a brake warning appears, or the engine temperature climbs. If the car will not start or runs badly, have it towed.
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 24
| Brand | Code | Description | System |
|---|---|---|---|
| BYD | U1700 | SCU message lost Brand | Network |
| Chery | U1700 | SWS communication line Brand | Network |
| Daewoo | U1700 | No description available | Network |
| DFFX | U1700 | SWS communication line Brand | Network |
| EOBD | U1700 | Kerearvuti Brand | Network |
| Ford | U1700 | No description available | Network |
| Geely | U1700 | SWS communication line Brand | Network |
| GM | U1700 | No description available | Network |
| Great Wall | U1700 | SWS communication line Brand | Network |
| Hafei | U1700 | SWS communication line Brand | Network |
| Holden | U1700 | Lost Communication with Body Control Module Brand | Network |
| Honda | U1700 | No description available | Network |
| Hyundai | U1700 | No description available | Network |
| Mahindra | U1700 | No description available | Network |
| Maserati | U1700 | No description available | Network |
| Mazda | U1700 | No description available | Network |
| Mitsubishi | U1700 | SWS communication line Brand | Network |
| Opel | U1700 | No description available | Network |
| Peugeot | U1700 | No description available | Network |
| Proton | U1700 | SWS communication line Brand | Network |
| Saab | U1700 | No description available | Network |
| MG (SAIC) | U1700 | Manual Crank Inhibit Brand | Network |
| Suzuki | U1700 | Invalid Data Received From Powertrain System Brand | Network |
| Tata | U1700 | CAN: Body Computer Node Brand | Network |
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.
5Related codes
Browse Uxxx codes or U170xx codes.