What are the common causes of U0262?

Damaged wiring between audio amplifier B and the computer system. A failed audio amplifier B from heat, a surge, or physical damage. Corrosion or water at the amplifier connections. The audio system installed or configured incorrectly.

Scan and confirm audio amplifier B is offline. Inspect the amplifier B wiring and connector. Check the amplifier for heat, surge, or water damage. Verify the audio system install and configuration. Replace audio amplifier B if faulty. Clear the code and retest.

U0262

Lost Communication With Audio Amplifier B

System: Network communication (U code)
Lamp: Check Engine Light
Category: Network Communications

What it means

U0262 means Lost Communication With Audio Amplifier B.

Check these first

Damaged wiring between audio amplifier B and the computer system
A failed audio amplifier B from heat, a surge, or physical damage
Corrosion or water at the amplifier connections
The audio system installed or configured incorrectly

What to do next

Scan and confirm audio amplifier B is offline
Inspect the amplifier B wiring and connector
Check the amplifier for heat, surge, or water damage
Verify the audio system install and configuration
Replace audio amplifier B if faulty
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.