U0199 Code: Meaning, Symptoms, Causes & Fix

Overview

Code U0199 indicates a fault in Lost Communication With Door Control Module A, typically within body electronics and comfort modules.

Symptoms

module resets or glitches
feature inoperative intermittently
battery draw complaints

Common causes

CAN bus wiring fault affecting lost communication with door control module a
Network termination or gateway fault
Connector pin damage/corrosion or harness stress near related components

How to diagnose U0199

Confirm U0199 and capture freeze-frame data with a professional scan tool.
Inspect wiring, connectors, and grounds related to lost communication with door control module a for obvious defects.
Check CAN high/low integrity, network termination resistance, and module wake-up status.
Check for related DTCs to identify the root-cause chain before replacing parts.
After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code U0199

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with U0199?

Most vehicles can be driven short-term with U0199, but postpone heavy load/highway driving until repaired.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

Repair obvious wiring/connector faults first to prevent repeat parts replacement.
Address the root fault mode (communication) in the lost communication with door control module a circuit/system.
Apply the required relearn/adaptation procedure if specified by service information.
Road-test and verify U0199 remains cleared under the conditions that originally set the code.

Fix options

Stabilize voltage supply and module grounds.
Repair CAN high/low wiring or termination issue.
Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$160-$850

Common mistakes when diagnosing U0199

Replacing parts without verifying voltage, ground, and signal integrity first.
Ignoring related stored/pending codes that indicate upstream faults.
Skipping post-repair verification drive cycle and readiness checks.

U0199 in common vehicles

U0199 appears across makes such as Nissan, Hyundai, Kia, Volkswagen. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes U0199?

U0199 is commonly set by communication faults affecting lost communication with door control module a.

How much does it cost to fix U0199?

For U0199, repair costs are typically $160-$850 depending on exact root cause, labor rates, and part quality.

Can I clear U0199 without repair?

You can clear U0199 temporarily, but the code usually returns until the underlying fault is corrected.