U0300moderate severityNetwork
Internal Control Module Software Incompatibility
on 2023 Chevrolet Bolt EUV 65 kWh Single Motor FWD · FWD
What this code means
Software version mismatch between communicating modules causing data interpretation errors.
Symptoms
- Warning lights on
- Systems behaving erratically
- Features not working correctly after update
- Communication errors between modules
Common causes
- Module software not updated together
- Partial software update
- Incorrect software version flashed
- Aftermarket module with wrong software
Diagnostic steps
- Check software versions on all modules
- Compare to required version table
- Perform full vehicle software update
- Check for TSBs regarding software updates
Repair notes
Perform complete vehicle software update. All related modules must be updated together.
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus