U0156 low

Lost Communication With Information Center A

The U0156 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Information Center A. This is a low severity code.

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Keep driving?
Yes, but fix soon
DIY difficulty
moderate
Estimated cost
$100 - $800 (parts and labor)
Diagnose CAN Bus Issues
LAUNCH CRP123X Full System Scanner

Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.

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Common Symptoms

  • Instrument cluster display blank or partially working
  • Trip computer not displaying information
  • No fuel economy or range data shown
  • Driver information center messages not appearing
  • Warning messages not displayed on screen

Probable Causes (Ranked by Likelihood)

  • Failed instrument cluster or information display module Very High
  • Damaged CAN bus wiring to information center High
  • Corroded connector at information center module Moderate
  • Information center software glitch Moderate
  • Power supply or ground issue at display module Low

Step-by-Step Diagnostic Procedure

  1. Scan for DTCs in the instrument cluster and body control modules

  2. Try a battery disconnect for 10 minutes to reset the information center

  3. Check CAN bus wiring and connector at the information display module

  4. Verify power supply and ground at the module

  5. Check for software updates or TSBs for the instrument cluster

Frequently Asked Questions

Can I drive with code U0156?

Yes. The vehicle is safe to drive, but you may not have access to trip computer data, fuel economy readings, or other informational displays. Warning lights on the main gauge cluster should still function.

What causes U0156?

A failed information display module or a CAN bus wiring issue are the most common causes. Sometimes a simple battery disconnect and reconnect can reset a software glitch in the display.

Will I miss important warnings with U0156?

You may miss text-based warning messages that appear on the driver information display. However, the main gauge cluster warning lights (oil, temperature, battery, etc.) should still function independently.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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