NetworkU0137
SeriousSeverity: Serious - have it checked soon
Lost Communication With Trailer Brake Control Module
Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list
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 30
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | U0137 | Injector Cylinder 6. Incorrect Frequency, Pulse Width Or Period Incorrect Brand | Network |
| BAIC Motor | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Mercedes-Benz | U0137 | Lost Communication With Trailer Brake Control Module SAE | Network |
| BYD | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Chery | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Daewoo | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Daihatsu | U0137 | Lost communication with trailer brake control module Brand | Network |
| DFFS | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| DFFX | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| DFXK | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| EOBD | U0137 | Communicatieverlies met aanhangerremmodule Brand | Network |
| Ford | U0137 | Lost Communication With Trailer Brake Control Module SAE | Network |
| Geely | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| GM | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Great Wall | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Hafei | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Holden | U0137 | Lost Communication with Trailer Brake Control Module Brand | Network |
| Hyundai | U0137 | Lost Communication With Trailer Brake Control Module SAE | Network |
| Land Rover | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Maserati | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Mazda | U0137 | Lost Communication With Trailer Brake Control Module SAE | Network |
| Opel | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Perodua | U0137 | Lost communication with trailer brake control module Brand | Network |
| Peugeot | U0137 | Lost Communication With Trailer Brake Control Module SAE | Network |
| Porsche | U0137 | Lost Communication With Trailer Brake Control Module SAE | Network |
| Saab | U0137 | Lost Communication With Trailer Brake Control Module Brand | Network |
| Maxus (SAIC) | U0137 | lost communication with LSM Brand | Network |
| MG (SAIC) | U0137 | lost communication with LSM Brand | Network |
| Toyota | U0137 | Lost communication with trailer brake control module Brand | Network |
| Volkswagen | U0137 | SAE: No Communication With Trailer Brake Control Module 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 7
These 7-character codes are manufacturer-specific variants of U0137 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| Mercedes-Benz | U013700 | Invalid Trailer Signal Brand | Network |
| SsangYong | U013781 | Variant coding error: Transmission Control Unit (TCU) specification detection Brand | Network |
| Mercedes-Benz | U013782 | Communication with control unit 'TRAILER CONNECTION' unit has a malfunction. Counter error. Brand | Network |
| Mercedes-Benz | U013783 | Communication with control unit 'TRAILER CONNECTION' unit has a malfunction. CRC error. Brand | Network |
| Mercedes-Benz | U013786 | Communication with control unit 'TRAILER CONNECTION' unit has a malfunction. Signal error. Brand | Network |
| Mercedes-Benz | U013787 | Lost Communication TM Brand | Network |
| SsangYong | U013787 | CAN time-out TCU Brand | Network |
6Related codes
Browse Uxxx codes or U013xx codes.