U0156

Lost Communication With Information Center "A"

Car Fault Codes Network

Can you still drive? Yes, normally

Who can fix it? Needs a workshop

Typical repair time 30 minutes – 4 hours

Typical cost SAR 100 to 3,000

What it means

The information center is the display or module that shows the driver vehicle messages and data, such as fuel economy, alerts and settings. This code sets when messages from this module stop reaching the network. This unit varies a lot between makers; it may be part of the instrument cluster or a separate display in the center of the dash.

Symptoms4

Information display blank or frozen.
Warning messages or trip and fuel economy data not shown.
Vehicle settings not reachable from the display.
Display working intermittently, especially right after start-up.

Possible causes6

Blown module power fuse.
Weak battery or low voltage.
Loose or corroded module connector behind the dash.
Poor ground connection.
Open or shorted network wiring to the module, which may be on a low speed bus.
Internal failure of the module or display.

How to diagnose5

Use the service information to find which module information center A refers to on your vehicle.
Check the battery and the module fuse.
Try to connect to the module with a scan tool; if it does not respond, measure power and ground at its connector.
Inspect the connector for looseness or corrosion, especially after earlier dash work.
Check the network lines to the module and compare their resistance with the manufacturer specification.

How to fix6

Replace the blown fuse and charge or replace the battery.
Clean and secure the connector and repair the ground.
Repair damaged network wiring.
Update the module software if available, or have it repaired by an electronics shop.
Replace the module if proven faulty, then program it as the manufacturer instructs.
Clear the codes and confirm the display works over several start-ups.

Repair cost

0–500

500–2,000

2,000–5,000

5,000+

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low for a fuse or connector, and rises when the display or module must be replaced and programmed.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions

Is this code dangerous?

It usually does not affect the engine or brakes, but you may miss important warning messages shown on this display, so watch the cluster warning lights and fix it soon.

Why do technicians disagree on where this module is?

Because makers design it differently. On some vehicles it is part of the cluster, on others a separate display, so you need the service information for your vehicle.

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This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.

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