What Does U0473 Mean?
The airbag control module is receiving corrupted or implausible data from restraint system sensor C (often a side impact sensor or rear impact sensor). Network communication integrity between this sensor and the airbag module is compromised.
Safety Warning
Critical safety issue. Side or rear airbags may not function correctly during a collision. Vehicle should be repaired immediately by qualified personnel.
Common Causes
35%
Faulty or damaged restraint system sensor C (accelerometer/impact sensor)
30%
Corroded, loose, or damaged wiring harness connections to sensor C
20%
Water intrusion or corrosion in sensor C connector
10%
Failed airbag control module misinterpreting sensor data
5%
CAN bus communication fault or network interference
Diagnostic Steps
1
Step 1: Monitor live data from sensor C using scan tool to determine if sensor is sending data and if values are plausible
2
Step 2: Locate sensor C (typically side door area, B-pillar, or C-pillar) and inspect for impact damage, water intrusion, or mounting issues
3
Step 3: Disconnect and inspect sensor C connector for corrosion, damage, or moisture; clean with electrical contact cleaner
4
Step 4: Perform electrical tests on sensor C power supply, ground circuit, and communication lines per service manual specifications
5
Step 5: Replace sensor C if testing confirms failure; clear codes and verify no other restraint system codes are present
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
The airbag control module is receiving corrupted or implausible data from restraint system sensor C (often a side impact sensor or rear impact sensor). Network communication integrity between this sensor and the airbag module is compromised.
The most common cause of U0473 (Invalid Data Received From "Restraints System Sensor C") is: Faulty or damaged restraint system sensor C (accelerometer/impact sensor)
Typical repair costs for U0473 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Critical safety issue. Side or rear airbags may not function correctly during a collision. Vehicle should be repaired immediately by qualified personnel.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0473 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.
