What it means
A module reports a software version mismatch with the inductive (wireless) HV battery charger module — typically after replacing one of the modules without programming the new unit to match the rest of the network.
At a glance
- Usually lights the warning light of the system that lost communication
- The engine or gearbox may go into limp mode
How it works
The hybrid or EV inductive charger control module manages wireless charging of the high-voltage battery and exchanges status and control data with other modules. U0354 is set when a module detects that the charger's software or configuration is incompatible with the vehicle's network or its own software.
Common causes
Most likely first.
- Module replaced without programming
- Wrong part number for the vehicle
- Gateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
How to diagnose it
- Scan all modules and record freeze-frame data and network codes, noting whether U0354 began after charger or module replacement.
- Check that the inductive charger control module's part number matches the vehicle's equipment and build information.
- Inspect the charger module's low-voltage connectors, grounds, and network wiring for damage, corrosion, or loose terminals.
- Check the gateway and other modules for communication or routing faults that could disrupt messages from the charger module.
- Verify the charger's software and configuration against the vehicle requirements, and perform the specified programming procedure if needed.
Common fixes
- Repair damaged or poorly connected charger module wiring or connectors.
- Correct the gateway configuration or network fault if it is preventing proper message routing.
- Program or update the charger control module to the compatible vehicle software.
- Replace a charger module with an incorrect part number and configure the correct unit.
Can I keep driving?
A software mismatch can disable wireless high-voltage battery charging and may trigger warnings or reduced vehicle operation. Do not rely on inductive charging until the fault is resolved, and follow any high-voltage system warnings displayed by the vehicle.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.