What Does U055D Mean?
A receiving module has detected invalid or corrupted data from Special Purpose Vehicle Control Module D. This represents a data integrity issue with a fourth specialized control module whose application is vehicle-specific.
Common Causes
35%
Defective special purpose control module D with internal failures
30%
Corroded or damaged electrical connections to module D
20%
CAN bus network problems affecting communication quality
10%
Software or firmware corruption in module D
5%
Electrical power supply issues or voltage instability
Diagnostic Steps
1
Step 1: Reference vehicle-specific service information to identify the role and function of Special Purpose Control Module D in your vehicle
2
Step 2: Analyze scan tool live data from module D to pinpoint which data elements are corrupted or out of acceptable range
3
Step 3: Thoroughly inspect module D connectors and wiring for physical damage, corrosion, or poor connections; test power and ground circuits
4
Step 4: Check CAN bus network health at module D using oscilloscope; measure termination resistance and verify signal quality
5
Step 5: Reflash module D programming if updates are available; substitute with known-good module for testing; replace if confirmed defective
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
A receiving module has detected invalid or corrupted data from Special Purpose Vehicle Control Module D. This represents a data integrity issue with a fourth specialized control module whose application is vehicle-specific.
The most common cause of U055D (Invalid Data Received From Special Purpose Vehicle Control Module "D") is: Defective special purpose control module D with internal failures
Typical repair costs for U055D range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safety impact varies depending on the specific equipment or function controlled by Module D. Could affect specialized vehicle systems that may have safety relevance in certain applications.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U055D to identify the root cause.
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Quick Info
Category
Network
System
Communication Network / Special Purpose Equipment
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
