U Series — Network
3 U series network fault codes
| Code | Description | System | Severity | Brand |
|---|---|---|---|---|
| U0100 | Lost Communication With ECM/PCM | Network / Communication | High | Generic |
| U0101 | Lost Communication With TCM | Network / Communication | High | Generic |
| U0155 | Lost Communication With Instrument Panel Cluster | Network / Communication | Med | Generic |