العربية
U0199

Lost Communication With Door Control Module "A"

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 – 4 hours
Typical cost SAR 100 to 2,500

What it means

A door control module runs the power window, lock, mirror and switches in that door. This code sets when messages from door module A stop reaching the network. On many vehicles A is the driver door module, but the maker decides the naming. The most common cause is broken wires inside the flexible rubber boot between the door and the body, from years of opening and closing the door.

Related codes: U0200U0140U0141U0214U0019

Symptoms4

  • Door window or window switches in the driver door not working.
  • Central locking not working at that door, or at all doors if the commands pass through it.
  • Side mirror adjustment or folding not working.
  • Door functions cutting in and out as the door is opened or closed.

Possible causes6

  • Broken or cracked wires inside the rubber boot between the door and the body.
  • Water in the door module or its connector from a damaged inner door seal.
  • Blown door module power fuse.
  • Loose or corroded door connector at the pillar.
  • Weak battery or low voltage.
  • Internal door module failure.

How to diagnose5

  1. Use the service information to find which door the letter A refers to on your vehicle.
  2. Check the door module fuse and the battery.
  3. Open and close the door slowly while watching the window or the scan tool connection; if it changes with movement, the fault is in the boot wiring.
  4. Open the rubber boot and inspect the wires for cracks or breaks.
  5. Check the door module and connector for water, and measure power, ground and the network lines at the module.

How to fix5

  1. Replace the blown fuse.
  2. Repair broken wires inside the rubber boot with proper soldering and insulation.
  3. Dry the door module, clean the connector and renew the inner door seal.
  4. Replace the door module if proven faulty, then program it or run the window learn procedure as the manufacturer instructs.
  5. Clear the codes and test the windows, locks and mirror while opening and closing the door.

Repair cost

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

The cost is low for a fuse or a broken wire in the door boot, and rises when the door 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

Why do door wires break?

The wires flex inside the rubber boot every time the door opens and closes, and over the years they crack and break, especially in the driver door, which is opened most.

Is the car safe to drive?

Yes, it does not affect the engine or brakes, but make sure the door locks and the window is not stuck open, and fix it soon to protect the car from theft and dust.

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

U0200 Lost Communication With Door Control Module "B" Low Network U0140 Lost Communication With Body Control Module High Network U0141 Lost Communication With Body Control Module "A" Medium Network U0214 Lost Communication With Remote Function Actuation Medium Network U0019 Low Speed CAN Communication Bus Medium Network U0100 Lost Communication With ECM/PCM "A" High Network