What Does U0154 Mean?
Communication has been lost with the occupant classification/sensing module that determines seat occupancy and passenger weight. This module controls airbag deployment based on occupant presence and size.
Safety Warning
Passenger airbag may not deploy correctly based on occupant size/weight, potentially causing injury to small passengers or children. System may default to airbag-off mode.
Common Causes
35%
Faulty occupant sensing module or passenger seat weight sensor mat
30%
Damaged wiring or connector under passenger seat (subject to moisture and movement)
20%
Poor ground connection at module or sensor mat
10%
CAN bus communication fault affecting occupant sensing circuit
5%
Low voltage condition or blown fuse to occupant sensing system
Diagnostic Steps
1
Step 1: Check passenger airbag indicator light on dash/mirror, verify if occupant detection is functioning
2
Step 2: Inspect under passenger seat for loose connectors, damaged wiring, or water intrusion (common issue area)
3
Step 3: Use scan tool to monitor occupant classification module data (weight reading, classification status)
4
Step 4: Check module power and ground circuits with multimeter at the occupant sensing module connector
5
Step 5: Test seat weight sensor mat resistance according to manufacturer specifications, check for internal mat damage
Estimated Repair Cost
$350 - $1,500
Parts + labor, varies by vehicle and location
Communication has been lost with the occupant classification/sensing module that determines seat occupancy and passenger weight. This module controls airbag deployment based on occupant presence and size.
The most common cause of U0154 (Lost Communication With Restraints Occupant Sensing Control Module) is: Faulty occupant sensing module or passenger seat weight sensor mat
Typical repair costs for U0154 range from $350 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Passenger airbag may not deploy correctly based on occupant size/weight, potentially causing injury to small passengers or children. System may default to airbag-off mode.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0154 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.
