What Does U0064 Mean?
This code indicates a complete loss of communication on the vehicle's Communication Bus E network. One or more modules cannot communicate with each other on this specific data bus, preventing normal vehicle operation of systems connected to this network.
Safety Warning
Vehicle may not start or may enter limp mode with multiple system failures. Critical safety systems like airbags, ABS, or stability control may be disabled, making the vehicle unsafe to drive.
Common Causes
35%
Failed gateway module or communication hub that bridges Bus E to other networks
30%
Damaged or corroded wiring harness affecting Bus E circuit integrity
20%
Failed control module connected to Bus E network
15%
Short circuit or open circuit in Bus E twisted pair wiring
Diagnostic Steps
1
Step 1: Check all related DTCs from multiple modules to identify which module(s) report communication loss
2
Step 2: Visually inspect all Bus E wiring harnesses and connectors for damage, corrosion, or loose connections
3
Step 3: Measure Bus E termination resistance at network endpoints (should be approximately 60 ohms with ignition off)
4
Step 4: Use oscilloscope to check Bus E signal integrity and voltage levels during communication
5
Step 5: Isolate suspect modules one at a time to identify if a specific module is pulling down the network
Estimated Repair Cost
$200 - $1,500
Parts + labor, varies by vehicle and location
This code indicates a complete loss of communication on the vehicle's Communication Bus E network. One or more modules cannot communicate with each other on this specific data bus, preventing normal vehicle operation of systems connected to this network.
The most common cause of U0064 (Vehicle Communication Bus E) is: Failed gateway module or communication hub that bridges Bus E to other networks
Typical repair costs for U0064 range from $200 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may not start or may enter limp mode with multiple system failures. Critical safety systems like airbags, ABS, or stability control may be disabled, making the vehicle unsafe to drive.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0064 to identify the root cause.
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Quick Info
Category
Network
System
Vehicle Communication Network
Difficulty
Type
Generic (SAE)
Recommended Tools
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