U0495: Invalid Data Received From Digital Audio Control Module B

What it means

A control module received invalid data from digital audio control module B. The code identifies a data validity fault; the specific affected function depends on the vehicle.

How it works

Digital audio control module B sends audio-system status and control data over the vehicle network. This code sets when another module receives data from module B but judges it invalid, which points to the data stream from B rather than module A.

Common causes

Most likely first.

1. Fault in the transmitting module
2. Network wiring or connector fault
3. Module power or ground fault
4. Software or configuration mismatch

Symptoms

• Audio functions may not work correctly
• Infotainment warning or related communication codes may appear

How to diagnose it

1. Use a scan tool to save freeze-frame details and see whether U0495 returns, since an intermittent network disturbance may have cleared.
2. Check which modules report U0495 and look for related communication or audio codes that also point to digital audio module B.
3. Inspect module B's connectors and network wiring for loose pins, corrosion, damage, or chafing.
4. Check module B's power and ground using the manufacturer's diagnostic procedure, because unstable supply can affect its network messages.
5. If connections and supplies are sound, check module B with vehicle-specific network tests and confirm its software and configuration.

Common fixes

• Reconnect or clean a loose or corroded digital audio module B connector.
• Repair damaged network wiring to module B.
• Repair a poor module B power or ground connection.
• Install the correct software or configuration if specified for the vehicle.
• Replace digital audio control module B if testing confirms an internal fault.

Can I keep driving?

This code alone usually does not affect vehicle control or emissions, but audio functions may be unreliable. Avoid adjusting infotainment settings while driving.