What Does U0152 Mean?
The control module has lost communication with the left side airbag/restraint control module over the vehicle's communication network (typically CAN bus). This indicates a network connectivity issue preventing data exchange between safety system components.
Safety Warning
Left side airbags and side curtain airbags may not deploy in a collision. Airbag warning light will be illuminated, indicating safety system malfunction.
Common Causes
35%
Faulty left side restraint control module (internal failure or corrupted software)
30%
Damaged or corroded wiring harness/connectors between modules
20%
Poor ground connection or open circuit in module power supply
10%
CAN bus network fault (shorted, open, or improper termination)
5%
Low battery voltage or charging system issues affecting module operation
Diagnostic Steps
1
Step 1: Check battery voltage (should be 12.4V+ key off, 13.5-14.5V running) and inspect battery terminals for corrosion
2
Step 2: Locate left side restraint module (typically under driver or left seat) and inspect connector for damage, corrosion, or looseness
3
Step 3: Using scan tool, attempt to communicate directly with left side restraint module to determine if module responds
4
Step 4: Check module power and ground circuits with multimeter (verify battery voltage at power pin and less than 0.1V at ground)
5
Step 5: Measure CAN bus resistance between CAN High and CAN Low (should read 60 ohms with ignition off), inspect CAN wiring for shorts or opens
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
The control module has lost communication with the left side airbag/restraint control module over the vehicle's communication network (typically CAN bus). This indicates a network connectivity issue preventing data exchange between safety system components.
The most common cause of U0152 (Lost Communication With Side Restraints Control Module Left) is: Faulty left side restraint control module (internal failure or corrupted software)
Typical repair costs for U0152 range from $300 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Left side airbags and side curtain airbags may not deploy in a collision. Airbag warning light will be illuminated, indicating safety system malfunction.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0152 to identify the root cause.
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Quick Info
Category
Network
System
Supplemental Restraint System (SRS/Airbag)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
