What it means
A receiving control module has detected invalid data from Audio Amplifier B. The code does not specify which data is invalid or why.
How it works
Audio Amplifier B processes and distributes audio signals and can exchange status data with other modules. U0563 is set when a receiving module rejects data from this B-designated amplifier as invalid; it does not identify the audio channel or function involved.
Common causes
Most likely first.
- Module internal fault or sensor input drift
- Software version mismatch after replacement
- 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 the infotainment and body modules and save freeze-frame and communication codes to identify the receiver reporting U0563.
- Check whether audio, warning tones, or related infotainment functions fail and whether the code is current or stored.
- Inspect Audio Amplifier B's connectors and accessible harness for loose plugs, corrosion, damage, or water intrusion.
- Verify amplifier power, ground, and network wiring using the vehicle wiring information and manufacturer's specification.
- Check gateway routing and amplifier software or configuration, especially after audio-system or module replacement.
- If the network and configuration are correct, use vehicle-specific diagnostics to test the amplifier and its inputs.
Common fixes
- Reconnect or repair a loose Audio Amplifier B connector.
- Repair damaged wiring or correct a poor amplifier power or ground connection.
- Correct gateway routing or amplifier configuration errors.
- Install the appropriate software or programming if a mismatch is confirmed.
- Repair or replace Audio Amplifier B if testing confirms an internal fault.
Can I keep driving?
This code commonly affects audio or related infotainment features rather than basic vehicle control. If warning tones or alerts are missing, do not rely on them and pay attention to the instrument panel and road conditions.
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.