Lost Communication With Door Control Module B
The U0199 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Door Control Module B. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $150 - $500 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Passenger door power window inoperative
- Passenger door lock not responding to remote
- Passenger side mirror not adjusting
- Door ajar light stays on for passenger door
- Child lock function may be affected
Probable Causes (Ranked by Likelihood)
- Failed passenger door control module Very High
- Broken wires in passenger door jamb boot High
- Water intrusion in passenger door panel Moderate
- Corroded connector at passenger door module Moderate
Step-by-Step Diagnostic Procedure
-
Check for broken wires in the passenger door jamb flex area
-
Inspect the door module connector inside the door panel for water damage
-
Verify power and ground at the passenger door control module
-
Check the door module fuse
-
Scan for related body control module codes
Frequently Asked Questions
Can I drive with code U0199?
Yes, safe to drive. Only the affected passenger door window, lock, and mirror controls are impacted.
What causes U0199?
Same as other door module codes, broken wires in the door jamb are the most common cause. The wiring flexes each time the door opens and eventually breaks.
Is U0199 expensive to fix?
Typically $150 to $500. Wire repair in the door jamb is on the lower end. Full door module replacement costs more.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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