What Does U0292 Mean?
Communication has been lost with drive motor control module 'B'. This indicates failure of a secondary motor controller in multi-motor electric or hybrid vehicles, such as rear axle motor in AWD configurations.
Safety Warning
Vehicle will likely operate in reduced power mode or may not drive. High-voltage system requires certified technician. Loss of AWD capability may affect vehicle stability in adverse conditions.
Common Causes
35%
Failed drive motor control module B
25%
Damaged high-voltage or communication wiring to motor module B
20%
Connector corrosion or damage at motor controller B
15%
CAN bus network fault on powertrain communication network
5%
Power supply interruption to motor controller B
Diagnostic Steps
1
Step 1: Implement high-voltage safety procedures and verify system is safely de-energized
2
Step 2: Check low-voltage control power and ground circuits at motor controller B
3
Step 3: Inspect high-voltage connections and communication connectors for damage or corrosion
4
Step 4: Use manufacturer diagnostic software to test network communication and motor B parameters
5
Step 5: Replace motor control module B if all electrical and communication circuits test within specification
Estimated Repair Cost
$2,000 - $5,000
Parts + labor, varies by vehicle and location
Communication has been lost with drive motor control module 'B'. This indicates failure of a secondary motor controller in multi-motor electric or hybrid vehicles, such as rear axle motor in AWD configurations.
The most common cause of U0292 (Lost Communication With Drive Motor Control Module "B") is: Failed drive motor control module B
Typical repair costs for U0292 range from $2,000 to $5,000, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle will likely operate in reduced power mode or may not drive. High-voltage system requires certified technician. Loss of AWD capability may affect vehicle stability in adverse conditions.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0292 to identify the root cause.
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Quick Info
Category
Network
System
Electric Drive System
Difficulty
Type
Generic (SAE)
Recommended Tools
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