What Does U1044 Mean?
The requesting module cannot receive valid traction motor data over the SCP network. This is specific to hybrid or electric vehicles where traction motor information must be shared across the communication bus.
Safety Warning
Vehicle may enter reduced power mode or fail to operate. Hybrid system may shut down completely, potentially leaving vehicle stranded.
Common Causes
40%
Hybrid/electric powertrain control module communication failure
25%
High voltage system fault preventing traction motor operation
20%
Network wiring damage between powertrain modules
10%
Traction motor position sensor or resolver failure
5%
Software calibration mismatch or corrupted module programming
Diagnostic Steps
1
Step 1: Check for high voltage system codes in hybrid/electric powertrain control module
2
Step 2: Verify traction motor is operational by monitoring motor speed and torque data on scan tool
3
Step 3: Inspect high voltage connectors and shielded network cables for damage or corrosion
4
Step 4: Test traction motor resolver/position sensor signals with oscilloscope
5
Step 5: Verify all hybrid system modules have correct software versions and are properly programmed
Estimated Repair Cost
$300 - $3,000
Parts + labor, varies by vehicle and location
The requesting module cannot receive valid traction motor data over the SCP network. This is specific to hybrid or electric vehicles where traction motor information must be shared across the communication bus.
The most common cause of U1044 (SCP (J1850) Invalid or Missing Data for Traction Motor) is: Hybrid/electric powertrain control module communication failure
Typical repair costs for U1044 range from $300 to $3,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may enter reduced power mode or fail to operate. Hybrid system may shut down completely, potentially leaving vehicle stranded.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U1044 to identify the root cause.
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Quick Info
Category
Network
System
Network Communication / Hybrid Traction Motor
Difficulty
Type
Manufacturer
Recommended Tools
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