Network / CANModerate⚠️ Professional Recommended

U0155

Q: What does OBD2 code U0155 mean?

U0155 means: Lost Communication With Instrument Panel Cluster. A module (commonly the ECM or BCM) has lost CAN bus communication with the instrument panel cluster, so gauge and warning light data can no longer be exchanged.

Lost Communication With Instrument Panel Cluster

A module (commonly the ECM or BCM) has lost CAN bus communication with the instrument panel cluster, so gauge and warning light data can no longer be exchanged.

SeverityModerate

CategoryNetwork / CAN

Est. Repair Cost$200–$800

Code TypeNetwork

DIY RepairProfessional

⚡ Common Causes

›Failed instrument cluster
›CAN bus wiring fault
›Power loss to cluster

⚠️ Symptoms

›Blank instrument cluster
›No gauges
›Warning lights not working

✅ How to Fix — Step by Step

Step 1:Check cluster fuse and power
Step 2:Inspect CAN wiring to cluster
Step 3:Replace instrument cluster

🔧 Diagnostic Tools Required

✔OBD-II Diagnostic Scanner
✔CAN Bus Tester
✔Digital Multimeter
✔Oscilloscope

Using the correct diagnostic tools helps identify the root cause of U0155 before replacing parts unnecessarily. Always confirm the fault using live data and manufacturer-recommended diagnostic procedures.

💡 Pro Tip: Check the instrument cluster's power and ground circuits before assuming a wiring fault on the CAN bus itself — a cluster with no power will also show as a lost-communication code.

Frequently Asked Questions

What does OBD2 code U0155 mean?+

U0155 stands for Lost Communication With Instrument Panel Cluster. A module (commonly the ECM or BCM) has lost CAN bus communication with the instrument panel cluster, so gauge and warning light data can no longer be exchanged.

What causes code U0155?+

Failed instrument cluster; CAN bus wiring fault; Power loss to cluster

How do I fix code U0155?+

Check cluster fuse and power; Inspect CAN wiring to cluster; Replace instrument cluster

How much does it cost to fix U0155?+

Estimated repair cost for U0155 is $200–$800.

Is U0155 DIY-friendly?+

U0155 typically requires professional equipment and a qualified mechanic.