What Does U0157 Mean?
Communication has been lost with information center 'B', typically a secondary display or redundant message center. This affects auxiliary information displays and system status messages.
Common Causes
35%
Faulty secondary information display module (hardware or software failure)
30%
Damaged wiring or connector at secondary display location
20%
CAN bus network communication fault
10%
Power or ground circuit failure to secondary display
5%
Body control module or gateway module communication issue
Diagnostic Steps
1
Step 1: Identify location of information center B (may be overhead console, rear seat display, or secondary dash display)
2
Step 2: Inspect connector at information center B module for damage, corrosion, or disconnection
3
Step 3: Attempt scan tool communication with information center B module to verify module presence
4
Step 4: Test power and ground circuits at display module connector with multimeter
5
Step 5: Verify CAN bus signal integrity and resistance at information center B connection point
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
Communication has been lost with information center 'B', typically a secondary display or redundant message center. This affects auxiliary information displays and system status messages.
The most common cause of U0157 (Lost Communication With Information Center "B") is: Faulty secondary information display module (hardware or software failure)
Typical repair costs for U0157 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Minimal safety impact as this is typically a secondary or auxiliary display. Primary vehicle operation and safety systems are not affected.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0157 to identify the root cause.
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Quick Info
Category
Network
System
Body Control/Information Display
Difficulty
Type
Generic (SAE)
Recommended Tools
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