What Does U0149 Mean?
The module storing this code has lost communication with Gateway D on the vehicle's communication network. Gateway D facilitates data exchange between different network protocols or bus systems.
Common Causes
35%
Gateway D module failure or internal fault
30%
Damaged or corroded wiring harness to Gateway D
20%
Poor power or ground supply to Gateway D
10%
CAN bus wiring short or open circuit
5%
Software corruption or module requiring reprogramming
Diagnostic Steps
1
Step 1: Use advanced scan tool functions to map network communication and identify affected modules
2
Step 2: Measure and verify proper voltage and ground at Gateway D module location
3
Step 3: Inspect all wiring, connectors, and terminals to Gateway D for damage or environmental contamination
4
Step 4: Test CAN network integrity including resistance, voltage levels, and signal quality
5
Step 5: Reprogram or replace Gateway D module after confirming all circuit integrity
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
The module storing this code has lost communication with Gateway D on the vehicle's communication network. Gateway D facilitates data exchange between different network protocols or bus systems.
The most common cause of U0149 (Lost Communication With Gateway "D") is: Gateway D module failure or internal fault
Typical repair costs for U0149 range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Loss of Gateway D communication can affect multiple vehicle systems simultaneously. May result in warning lights, reduced functionality, or system shutdowns.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0149 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Network
System
Vehicle Communication Network
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
