What Does U0151 Mean?
The module storing this code has lost communication with the Restraints Control Module (airbag/SRS module) over the vehicle's communication network. This prevents other modules from receiving critical safety system status information.
Safety Warning
Critical safety concern. Airbags may not deploy in a collision when communication is lost. Vehicle should be repaired immediately and driven cautiously until fixed.
Common Causes
30%
Restraints Control Module failure or internal fault
25%
Damaged or corroded wiring to Restraints Control Module
20%
Poor power or ground supply to Restraints Control Module
15%
CAN bus communication circuit fault
10%
Recent airbag deployment or collision damage affecting module
Diagnostic Steps
1
Step 1: Check for airbag warning light illumination and verify if other SRS codes are present
2
Step 2: Locate and inspect Restraints Control Module for physical damage, water intrusion, or connector issues
3
Step 3: Verify power and ground at SRS module connector using multimeter (check fuse first)
4
Step 4: Test CAN bus communication lines for continuity, shorts, and proper resistance
5
Step 5: If wiring is intact, module may require reprogramming or replacement (handle with care due to airbag system)
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The module storing this code has lost communication with the Restraints Control Module (airbag/SRS module) over the vehicle's communication network. This prevents other modules from receiving critical safety system status information.
The most common cause of U0151 (Lost Communication With Restraints Control Module) is: Restraints Control Module failure or internal fault
Typical repair costs for U0151 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Critical safety concern. Airbags may not deploy in a collision when communication is lost. Vehicle should be repaired immediately and driven cautiously until fixed.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0151 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.
