What Does U0295 Mean?
Communication has been lost with the AC to AC Converter Control Module, typically found in hybrid or electric vehicles. This module manages power conversion between alternating current systems for high-voltage operations.
Safety Warning
High-voltage system fault may prevent vehicle operation or cause sudden power loss. Vehicle should be serviced immediately by qualified HV technicians only.
Common Causes
40%
Damaged or corroded high-voltage wiring harness or connectors to converter module
30%
Failed AC to AC Converter Control Module
15%
High-voltage system fault causing module shutdown or isolation
10%
Communication network fault on high-speed CAN bus
5%
Low 12V auxiliary battery voltage affecting module communication
Diagnostic Steps
1
Step 1: Perform high-voltage safety procedures and verify 12V auxiliary battery voltage is adequate (12.4V+)
2
Step 2: Check for additional high-voltage system DTCs that may indicate primary faults causing communication loss
3
Step 3: Inspect high-voltage connector to AC-AC converter for proper seating, corrosion, and interlock continuity
4
Step 4: Test communication network integrity on the high-speed CAN bus using bidirectional scan tool
5
Step 5: If all wiring and network tests pass, evaluate AC-AC converter module for internal failure and consider replacement
Estimated Repair Cost
$800 - $3,500
Parts + labor, varies by vehicle and location
Communication has been lost with the AC to AC Converter Control Module, typically found in hybrid or electric vehicles. This module manages power conversion between alternating current systems for high-voltage operations.
The most common cause of U0295 (Lost Communication With AC to AC Converter Control Module) is: Damaged or corroded high-voltage wiring harness or connectors to converter module
Typical repair costs for U0295 range from $800 to $3,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
High-voltage system fault may prevent vehicle operation or cause sudden power loss. Vehicle should be serviced immediately by qualified HV technicians only.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0295 to identify the root cause.
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Quick Info
Category
Network
System
High Voltage Power Conversion System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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