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U0155 — Lost Communication with Instrument Cluster
CautionNetwork/CANLimp to the next safe stop
Seen on: Heavy Truck
Lost Communication with Instrument Cluster. Common causes: IPC not responding on CAN.
Don't risk it — get a diesel tech on the truck.
Your code rides along, so nearby mechanics see the fault before they quote you.
How serious is it?
Caution. Limp to the next safe stop.
Most likely causes
- IPC not responding on CAN
- IPC power/ground
- CAN fault
First moves (roadside)
- Check IPC power and CAN connections
- inspect instrument cluster connector
FAQ
What does U0155 mean?
Lost Communication with Instrument Cluster. Common causes: IPC not responding on CAN.
How serious is U0155?
Caution — Limp to the next safe stop.
What's the most likely cause of U0155?
The most common cause is: IPC not responding on CAN. Other possibilities include IPC power/ground; CAN fault.
Can I keep driving with U0155?
Limp to the next safe stop. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
Find a mechanic or related guides
General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.