What Does U0594 Mean?
The control module receiving data from the hybrid powertrain control module has detected invalid or implausible data on the vehicle communication network. This module coordinates power flow between the electric motor and internal combustion engine in hybrid vehicles.
Safety Warning
Vehicle may not operate properly in hybrid mode or may be limited to gasoline-only operation. Critical high-voltage safety procedures must be followed during diagnosis.
Common Causes
35%
Hybrid powertrain control module internal failure or corrupted calibration
25%
Damaged or corroded wiring harness at hybrid control module connectors
20%
Failed sensor input causing invalid data calculation (battery SOC, motor temp, etc.)
15%
Low voltage or poor ground connection at hybrid powertrain control module
5%
CAN bus communication network fault or interference
Diagnostic Steps
1
Step 1: Review all live data from hybrid powertrain control module and identify which parameters show invalid or out-of-range values
2
Step 2: Inspect hybrid control module connectors and wiring for corrosion, damage, or loose connections
3
Step 3: Test all voltage inputs and ground circuits to hybrid powertrain control module per specifications
4
Step 4: Check sensor inputs (battery SOC, motor temperature, current sensors) for proper operation and signal quality
5
Step 5: Perform software update on hybrid control module; replace module if invalid data persists after updates
Estimated Repair Cost
$1,200 - $4,500
Parts + labor, varies by vehicle and location
The control module receiving data from the hybrid powertrain control module has detected invalid or implausible data on the vehicle communication network. This module coordinates power flow between the electric motor and internal combustion engine in hybrid vehicles.
The most common cause of U0594 (Invalid Data Received From Hybrid Powertrain Control Module) is: Hybrid powertrain control module internal failure or corrupted calibration
Typical repair costs for U0594 range from $1,200 to $4,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may not operate properly in hybrid mode or may be limited to gasoline-only operation. Critical high-voltage safety procedures must be followed during diagnosis.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0594 to identify the root cause.
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Quick Info
Category
Network
System
Hybrid Powertrain System
Difficulty
Type
Generic (SAE)
Recommended Tools
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