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U0155 U0xxx · 网络通信（U） 中严重度
Lost Communication with Instrument Panel Cluster
The cluster is off-line. Besides the obvious display loss, the cluster is often the gateway between buses — its absence can silence other modules.
严重程度说明： 中——已影响行驶或排放，请本周内安排检修
你会注意到的故障现象
- Blank or dead instrument display
- No speedometer or warnings
- Other modules unreachable
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 Cluster power or earth fault
- 2 CAN fault
- 3 Failed cluster
- 4 Software fault
如何排查
先做花钱最少、侵入最小的检查——大多数这类码不是零件问题。
- ✓ Check cluster fuses and earths.
- ✓ Determine whether the cluster acts as gateway on this vehicle — if so, expect wider communication loss.
- ✓ Measure CAN at the cluster connector.
- ✓ Check for software updates or a reset procedure.
维修方案
- Repair supply or earth
- Repair the CAN wiring
- Replace and configure the cluster
U0155 —— 常见问题
Why do other modules vanish when the cluster dies? +
On many vehicles the cluster is the gateway between the body and powertrain buses.
Can I drive with a dead cluster? +
Usually yes, but you have no speed, warnings or fuel level. Repair before normal use.