NetworkU1009
SeriousSeverity: Serious - have it checked soon
ECU silent on suspension and wheel CAN network
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 27
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | U1009 | No description available | Network |
| Mercedes-Benz | U1009 | No description available | Network |
| BYD | U1009 | Low speed CAN communication line fault Brand | Network |
| Chery | U1009 | No. 7 BMU and BMS communication abnormality Brand | Network |
| Daewoo | U1009 | Loss of serial communications for class 2 devices Brand | Network |
| DFFS | U1009 | ECU silent on suspension and wheel CAN network Brand | Network |
| DFXK | U1009 | Implausible Message from CAN Gateway Brand | Network |
| EOBD | U1009 | BMU mesej hilang Brand | Network |
| Ford | U1009 | No description available | Network |
| Geely | U1009 | Implausible Message from CAN Gateway Brand | Network |
| GM | U1009 | Loss of serial communications for class 2 devices Brand | Network |
| Holden | U1009 | No description available | Network |
| Honda | U1009 | No description available | Network |
| Hyundai | U1009 | No description available | Network |
| Land Rover | U1009 | No description available | Network |
| Mahindra | U1009 | No description available | Network |
| Maserati | U1009 | LIN 2 Bus Brand | Network |
| Mazda | U1009 | Traction Control Trac Off Lamp Flashing Intermittently With Diagnostic Trouble Codes (DTCs) And/Or U1027 Stored In Memory Brand | Network |
| Mitsubishi | U1009 | BMU message lost Brand | Network |
| Opel | U1009 | Loss of serial communications for class 2 devices Brand | Network |
| Peugeot | U1009 | No description available | Network |
| Proton | U1009 | BMU message lost Brand | Network |
| Saab | U1009 | Loss of serial communications for class 2 devices Brand | Network |
| Smart | U1009 | No description available | Network |
| Sprinter | U1009 | No description available | Network |
| Tata | U1009 | EMS Bus Off Error Brand | Network |
| Toyota | U1009 | ECU silent on suspension and wheel CAN network 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.
5Extended variant codes 4
These 7-character codes are manufacturer-specific variants of U1009 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | U100900 | LIN bus 2 has a malfunction. Brand | Network |
| Mercedes-Benz | U100901 | Der LIN-Bus 2 hat Funktionsstörung. Es liegt ein allgemeiner elektrischer Fehler vor. Brand | Network |
| SsangYong | U100987 | CAN communication: Vehicle Control Unit (VCU) message not received Brand | Network |
| Mercedes-Benz | U100995 | Der LIN-Bus 2 hat Funktionsstörung. Mechanischer Aufbau nicht in Ordnung. Brand | Network |
6Related codes
Browse Uxxx codes or U100xx codes.