العربية
U0184

Lost Communication With Radio

Car Fault Codes Network

Severity Low It can wait a little, but get it checked soon.
Can you still drive? Yes, normally
Who can fix it? Needs a workshop
Typical repair time 30 minutes – 3 hours
Typical cost SAR 100 to 2,500

What it means

In modern vehicles the radio or infotainment unit is a module on the vehicle network, exchanging steering wheel button commands, display data and audio alerts. This code sets when messages from the radio stop reaching the network. Common causes include an aftermarket head unit or a radio left unplugged after dash repairs.

Related codes: U0155U0156U0140U0164U0019

Symptoms4

  • Radio, screen or sound not working.
  • Steering wheel audio buttons not working.
  • Phone connection or reversing camera not working when shown on the radio screen.
  • Warning chimes silent on vehicles that play them through the speakers.

Possible causes6

  • An aftermarket head unit installed without a suitable network interface.
  • Blown radio power fuse.
  • Loose radio or network connector behind it after dash work.
  • Weak battery or low voltage.
  • Open or shorted network wiring to the radio.
  • Internal failure of the radio or infotainment unit.

How to diagnose5

  1. Check whether an aftermarket head unit was installed or the radio was recently removed.
  2. Check the radio fuse and the battery.
  3. Try to connect to the radio with a scan tool; if it does not respond, measure power and ground at its connector.
  4. Check the connectors behind the radio and make sure they are fully seated.
  5. Check the network lines to the radio and compare their resistance with the manufacturer specification.

How to fix6

  1. Replace the blown fuse and charge a weak battery.
  2. Reseat the radio connectors firmly.
  3. Fit a proper interface for the aftermarket head unit, or reinstall the original radio.
  4. Repair damaged network wiring.
  5. Repair or replace the radio, then program it if the manufacturer requires it.
  6. Clear the codes and confirm the sound, steering wheel buttons and chimes work.

Repair cost

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

The cost is low for a fuse, connector or interface module, and rises when the original infotainment unit must be repaired or 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

Why did the code appear after installing a new head unit?

The original radio was a module on the network. When it is removed without a proper interface, other modules notice it is missing and store this code, and steering wheel buttons or chimes may stop working too.

Does this code affect the engine?

No, it does not affect the engine or brakes. However, some vehicles play safety chimes through the radio, so you may not hear them until it is fixed.

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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Related codes

U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module High Network U0156 Lost Communication With Information Center "A" Low Network U0140 Lost Communication With Body Control Module High Network U0164 Lost Communication With HVAC Control Module Low Network U0019 Low Speed CAN Communication Bus Medium Network U0100 Lost Communication With ECM/PCM "A" High Network