U0564: Invalid Data Received From Speech Recognition Module

What it means

A receiving control module has detected invalid data from the Speech Recognition Module. The code does not specify which data is invalid or why.

How it works

The Speech Recognition Module interprets spoken commands and may send recognition status or command data to other modules. U0564 is stored when a receiving module finds data from that speech module invalid; it does not specify which command or connected function is affected.

Common causes

Most likely first.

1. Module internal fault or sensor input drift
2. Software version mismatch after replacement
3. 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

1. Scan infotainment and body modules and record freeze-frame and companion communication codes to identify the receiver logging U0564.
2. Check whether voice commands fail or trigger incorrect functions and establish whether the code is current or intermittent.
3. Inspect the Speech Recognition Module's connectors and accessible wiring for loose connections, corrosion, or damage.
4. Check module power, ground, and network connections against vehicle wiring information and the manufacturer's specification.
5. Review recent infotainment or module replacement and verify software compatibility, configuration, and gateway routing.
6. If those checks are sound, use vehicle-specific diagnostics to test microphone inputs and the speech module.

Common fixes

• Reconnect or repair a loose Speech Recognition Module connector.
• Repair damaged wiring or restore a sound power or ground connection.
• Correct gateway routing or module configuration.
• Update or program compatible software if a mismatch is confirmed.
• Repair or replace the speech module or a failed input only after testing identifies the fault.

Can I keep driving?

The code generally affects voice-command features; use the relevant controls manually and avoid entering commands that could distract you while driving. If a voice command controls a safety-related feature on this vehicle, verify that feature works through its normal control.