What Does U0477 Mean?
The airbag control module is receiving corrupted or implausible data from restraint system sensor G (usually the last sensor in a multi-sensor array). This indicates the sensor is sending invalid information over the vehicle network.
Safety Warning
Critical safety issue. Airbag system integrity is compromised, affecting deployment decisions in a crash. Do not drive until repaired by qualified technician.
Common Causes
35%
Faulty or damaged restraint system sensor G (accelerometer/impact sensor)
30%
Corroded, loose, or damaged wiring harness connections to sensor G
20%
Water intrusion or corrosion in sensor G connector
10%
Failed airbag control module misinterpreting sensor data
5%
CAN bus communication fault or network interference
Diagnostic Steps
1
Step 1: Use scan tool to access sensor G data and verify if communication is present and values are within acceptable parameters
2
Step 2: Physically locate sensor G (location varies, commonly rear bumper area or final position in sensor array) and inspect for damage
3
Step 3: Examine sensor G connector for corrosion, terminal spread, moisture, or loose connection; clean and secure properly
4
Step 4: Perform electrical diagnostics on sensor G circuit including voltage supply, ground path, and signal wire integrity
5
Step 5: Replace sensor G if testing indicates failure; clear all codes, verify airbag light extinguishes, and confirm proper system operation
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 G (usually the last sensor in a multi-sensor array). This indicates the sensor is sending invalid information over the vehicle network.
The most common cause of U0477 (Invalid Data Received From "Restraints System Sensor G") is: Faulty or damaged restraint system sensor G (accelerometer/impact sensor)
Typical repair costs for U0477 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Critical safety issue. Airbag system integrity is compromised, affecting deployment decisions in a crash. Do not drive until repaired by qualified technician.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0477 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.
