Question 1

What does U0199 mean?

Accepted Answer

U0199 - Lost Communication with Door Control Module A. Communication lost with a door control module (typically driver's door).

Question 2

What are the symptoms of U0199?

Accepted Answer

Power window not working, Lock not working on that door, Mirror not adjusting

Question 3

What causes U0199?

Accepted Answer

Door module failure, Wiring break in door jamb, Connector corrosion, Water damage inside door

Question 4

How much does it cost to fix U0199?

Accepted Answer

Typical repair cost: $100-$600. Wiring through door jamb flexes every time door opens and can break. Check the harness between door and body.

U0199 — Lost Communication with Door Control Module A

Don't guess — diagnose U0199 the right way