NetworkU0102
SeriousSeverity: Serious - have it checked soon
Lost Communication With Transfer Case 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 35
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | U0102 | Accelerator Pedal Sensor 2 Voltage Low Brand | Network |
| BAIC Motor | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| BYD | U0102 | ECM failed to communicate with TCU Brand | Network |
| Chery | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| Chrysler | U0102 | Lost Communication With Transfer Case Control Module / AWD Brand | Network |
| Daewoo | U0102 | Brake Switch Circuit Low Voltage Brand | Network |
| DFFS | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| DFFX | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| DFXK | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| EOBD | U0102 | Kaotatud side ülekandejaama juhtmooduliga Brand | Network |
| Fiat | U0102 | Lost communication with transfer case control module / AWD Brand | Network |
| Ford | U0102 | Lost Communication With Transfer Case Control Module SAE | Network |
| Geely | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| GM | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| Great Wall | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| Hafei | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| Holden | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| Hyundai | U0102 | Lost Communication With Transfer Case Control Module SAE | Network |
| Isuzu | U0102 | Lost Communication With Transfer Case Control Module SAE | Network |
| Land Rover | U0102 | Lost communication with transfer case control module Brand | Network |
| Mahindra | U0102 | Lost Communication With Transfer Case Control Module SAE | Network |
| Maserati | U0102 | Lost Communication With Transfer Case Control Module /All Wheel Drive Brand | Network |
| Mazda | U0102 | Lost Communication With Transfer Case Control Module SAE | Network |
| Mitsubishi | U0102 | T/F case control CAN timeout Brand | Network |
| Nissan | U0102 | Lost Communication With Transfer Case Control Module SAE | Network |
| Opel | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| Peugeot | U0102 | Lost Communication With Transfer Case Control Module SAE | Network |
| Proton | U0102 | T/F case control CAN timeout Brand | Network |
| Saab | U0102 | Lost Communication with Transfer Case Control Module Brand | Network |
| Maxus (SAIC) | U0102 | Lost Communication With BMS Brand | Network |
| MG (SAIC) | U0102 | Lost Communication With BMS Brand | Network |
| Suzuki | U0102 | LOST COMM (TRANSFER) Brand | Network |
| Tata | U0102 | Lost Communication With Transfer Case Control Module Brand | Network |
| Toyota | U0102 | Lost communication with transfer case control module Brand | Network |
| Volkswagen | U0102 | SAE: No Communication with Transfer Case 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 11
These 7-character codes are manufacturer-specific variants of U0102 and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | U010200 | Cyclic CAN messages from transfer case ECU are unavailable Brand | Network |
| SsangYong | U010201 | CAN bus error Brand | Network |
| SsangYong | U010202 | CAN message not received (VCU 3AEh) Brand | Network |
| SsangYong | U010203 | CAN message not received (VCU 1D5h) Brand | Network |
| SsangYong | U010204 | CAN message not received (crash signal) Brand | Network |
| SsangYong | U010205 | CAN message error (VCU 3AEh) Brand | Network |
| SsangYong | U010206 | CAN message error (VCU 1D5h) Brand | Network |
| SsangYong | U010207 | CAN message error (crash signal) Brand | Network |
| SsangYong | U010208 | CAN communication error (VCU 3AEh) Brand | Network |
| SsangYong | U010209 | CAN communication error (VCU 1D5h) Brand | Network |
| SsangYong | U010210 | CAN communication error (crash signal) Brand | Network |
6Related codes
Browse Uxxx codes or U010xx codes.