What Does U0147 Mean?
The module storing this code has lost communication with Gateway B on the vehicle's communication network. Gateway B serves as a communication hub between different network segments or buses.
Common Causes
35%
Gateway B module failure or internal fault
30%
Damaged or corroded wiring harness to Gateway B
20%
Poor power or ground supply to Gateway B
10%
CAN bus wiring short or open circuit
5%
Software corruption or module requiring reprogramming
Diagnostic Steps
1
Step 1: Use scan tool to identify which specific modules have lost communication with Gateway B
2
Step 2: Verify power and ground at Gateway B module connector using multimeter
3
Step 3: Inspect all connectors and wiring to Gateway B for physical damage, corrosion, or water intrusion
4
Step 4: Test CAN bus integrity by measuring resistance and checking for shorts to power or ground
5
Step 5: Attempt module reprogramming or replacement if all circuits test normal
Estimated Repair Cost
$150 - $850
Parts + labor, varies by vehicle and location
The module storing this code has lost communication with Gateway B on the vehicle's communication network. Gateway B serves as a communication hub between different network segments or buses.
The most common cause of U0147 (Lost Communication With Gateway "B") is: Gateway B module failure or internal fault
Typical repair costs for U0147 range from $150 to $850, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Can affect multiple vehicle systems depending on network architecture. May result in loss of comfort features, warning light illumination, or reduced vehicle functionality.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0147 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.
