What Does U0444 Mean?
The control module receiving this code has detected that data from Body Control Module 'C' is present on the network but contains invalid, corrupted, or out-of-range values. This indicates a communication quality issue rather than a complete loss of communication.
Common Causes
35%
Corrupted or outdated software/firmware in Body Control Module C or receiving module
30%
Intermittent wiring issues, loose connections, or corrosion in CAN bus circuit serving BCM C
20%
Failing Body Control Module C sending corrupted data packets
10%
Incorrect CAN bus termination resistance causing signal degradation
5%
Electromagnetic interference from aftermarket accessories or damaged shielding
Diagnostic Steps
1
Step 1: Use scan tool to monitor live data from BCM C and verify which specific parameters are showing invalid values
2
Step 2: Check for Technical Service Bulletins (TSBs) regarding BCM C software updates or known communication issues
3
Step 3: Measure CAN bus voltage at BCM C connector (should be 2.5V nominal with fluctuations between 2.0-3.5V)
4
Step 4: Inspect BCM C connector for corrosion, bent pins, or moisture intrusion; check ground connections
5
Step 5: If wiring and connections are good, perform module software update or replacement of BCM C as needed
Estimated Repair Cost
$150 - $1,200
Parts + labor, varies by vehicle and location
The control module receiving this code has detected that data from Body Control Module 'C' is present on the network but contains invalid, corrupted, or out-of-range values. This indicates a communication quality issue rather than a complete loss of communication.
The most common cause of U0444 (Invalid Data Received From Body Control Module "C) is: Corrupted or outdated software/firmware in Body Control Module C or receiving module
Typical repair costs for U0444 range from $150 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
May cause erratic operation of body systems like lighting, windows, or locks. Typically not immediately dangerous but should be repaired promptly to ensure proper vehicle operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0444 to identify the root cause.
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Quick Info
Category
Network
System
Body Control Network
Difficulty
Type
Generic (SAE)
Recommended Tools
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