U0155Network Communication

Lost Communication With Instrument Panel Cluster Control Module

U0155 means a module has lost communication with the instrument panel cluster over the CAN bus. Gauges and warnings may go blank. It usually points to a wiring, power, ground, or connector fault.

🚗 Not recommended. Losing the cluster can black out gauges and warning lights, hiding critical information.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Wiring, connector, or CAN bus fault$50-$500

45%

Damaged or corroded wiring to the cluster.

#2Power or ground fault$50-$400

30%

Blown fuse or poor ground at the cluster.

#3Failed instrument cluster$300-$1000

15%

The cluster itself has failed.

🩺 Common Symptoms

Blank or frozen gauges
Warning lights not working
Erratic speedometer or tachometer
No display information
Other U-codes stored

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$400

Shop Cost

$150-$1000

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose U0155

1Check cluster fuses, power, and grounds first

2Inspect CAN wiring and connectors at the cluster

3Scan all modules for lost-communication patterns

4Back-probe the CAN bus for correct signal

❓ Frequently Asked Questions

Can I drive with U0155?

Not safely. You lose gauges and warning lights, so you cannot see critical information. Diagnose it first.

What causes U0155?

Wiring, connector, or power/ground faults at the instrument cluster, far more often than a failed cluster.

Why are my gauges dead with U0155?

The cluster receives most of its data over the bus. When it loses communication, gauges and warnings can go blank.

🔗 Related Codes

U0100U0121U0140U0146