What Does U0156 Mean?
Communication has been lost with information center 'A', typically the primary driver information display or message center. This affects the display of vehicle status, trip information, and system warnings.
Common Causes
35%
Faulty information center display module (internal failure or software corruption)
30%
Damaged wiring harness or connector to information center module
20%
CAN bus communication network fault
10%
Power supply or ground circuit issue to display module
5%
Body control module communication circuit fault
Diagnostic Steps
1
Step 1: Check if information center display is completely blank or shows partial function
2
Step 2: Inspect display module connector for damage, corrosion, or loose connection
3
Step 3: Use scan tool to attempt communication with information center module and check for module response
4
Step 4: Verify power and ground circuits to display module with multimeter
5
Step 5: Check CAN bus network integrity at information center connector, measure bus voltage and resistance
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
Communication has been lost with information center 'A', typically the primary driver information display or message center. This affects the display of vehicle status, trip information, and system warnings.
The most common cause of U0156 (Lost Communication With Information Center "A") is: Faulty information center display module (internal failure or software corruption)
Typical repair costs for U0156 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Loss of convenience features and vehicle status information. May not display important warnings or maintenance messages, but primary safety systems typically remain functional.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0156 to identify the root cause.
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Quick Info
Category
Network
System
Body Control/Information Display
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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