What Does U013A Mean?
These codes (U013A-U013F) are reserved by ISO/SAE standards for future network communication protocols. If they appear, it typically indicates a scan tool compatibility issue, corrupted module memory, or a non-standard implementation by the manufacturer.
Common Causes
35%
Scan tool firmware incompatibility or incorrect protocol selection
30%
Corrupted or failed control module memory
20%
Aftermarket ECU tune or non-standard software modification
15%
Communication bus voltage issue causing data corruption
Diagnostic Steps
1
Step 1: Verify scan tool is updated to latest firmware and correct vehicle protocol is selected
2
Step 2: Check for manufacturer-specific code definitions using factory scan tool or service information
3
Step 3: Inspect for aftermarket modifications, tuning devices, or non-OEM control modules
4
Step 4: Measure CAN bus voltage and verify proper termination resistance (typically 60 ohms between CAN-H and CAN-L)
Estimated Repair Cost
$100 - $800
Parts + labor, varies by vehicle and location
These codes (U013A-U013F) are reserved by ISO/SAE standards for future network communication protocols. If they appear, it typically indicates a scan tool compatibility issue, corrupted module memory, or a non-standard implementation by the manufacturer.
The most common cause of U013A (, U013B, U013C, U013D, U013E, U013F ISO/SAE Reserved) is: Scan tool firmware incompatibility or incorrect protocol selection
Typical repair costs for U013A range from $100 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Generally no direct safety impact, but if caused by module failure, other systems may be affected. Vehicle may operate normally despite code presence.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U013A to identify the root cause.
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Quick Info
Category
Network
System
Network Communication
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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