U0141

Lost Communication With Body Control Module "A"

Car Fault Codes Network

Can you still drive? With care, short trips only

Who can fix it? Needs a workshop

Typical repair time 30 minutes – 5 hours

Typical cost SAR 100 to 6,000

What it means

This code appears on vehicles that split body functions across more than one module, and means a module on the network is no longer receiving messages from body control module A. The maker decides what module A covers; it may be the front or main unit that runs lights, wipers or other functions. Symptoms follow the functions this module handles on your vehicle.

Symptoms4

A group of electrical functions stops together, such as lights, wipers or locks, depending on what module A controls.
Warning lights or messages in the cluster.
No start on some vehicles if the module takes part in key verification.
Other lost-communication codes related to body modules.

Possible causes6

Weak battery or loose terminals.
Blown power fuse for module A.
Water or corrosion in the module or its connectors.
Poor ground connection.
Open or shorted network wiring to the module.
Internal failure of module A.

How to diagnose5

Use the service information to find which module the letter A refers to on your vehicle, where it is and what it controls.
Test the battery and measure voltage, then try to connect to the module with a scan tool.
If the module does not respond, check its fuses, power and ground at the connector.
Inspect the module and its connectors for water or corrosion.
Check the network lines to the module and compare their resistance with the manufacturer specification.

How to fix5

Charge or replace the battery and replace any blown fuse.
Clean the connectors, repair the ground and fix any water entry.
Repair damaged network wiring.
Replace module A if proven faulty, then program it with the manufacturer tool.
Clear codes in all modules and test the functions the module controls.

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 battery, fuse or connector, and reaches the upper end if the 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

What does the letter A mean in this code?

The letter separates body modules on vehicles that have more than one, and the maker decides which one is A. You need the service information for your vehicle to find its location and functions.

How is it different from U0140?

U0140 is usually used on vehicles with a single body module, while U0141 and U0142 are used when there is more than one. Testing is the same, but the module involved differs.

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.

Report a mistake

Spotted something inaccurate? Tell us and we will review and correct it.