Is This Game Down
Browse games
You can fix thisReported

Path of Exile 2 error code 51: FMOD audio failure explained

Path of Exile 2 server status →Path of Exile 2 servers →

Written by

IsThisGameDown

Last checked

September 23, 2026

Steam Discussions — "FMOD system (Error code 51) Audio Bug" ↗

The game fails to start, showing "Exception: Failed to Init FMOD System. Error Code 51" before reaching the login screen.

Also appears as: poe2 error code 51, path of exile 2 error 51, failed to init fmod system error code 51, fmod system error 51 poe2, poe2 audio error 51

This is a local audio-device problem, not a server issue — FMOD is the third-party audio engine PoE2 runs on, and error 51 is FMOD's own "error initializing output device" code, thrown when it can't grab your configured playback device at startup.

Players are reporting it for Path of Exile 2 specifically in a Steam Discussions thread titled "FMOD system (Error code 51) Audio Bug." The same exact error and code number showed up years earlier in Path of Exile 1, where one affected player traced it to corrupted local audio configuration files and fixed it by resolving those — evidence this is a client-side audio-stack problem in GGG's engine generally, not something new or server-related in PoE2. No GGG staff reply has surfaced for either game's reports, and no single confirmed fix works for everyone — the steps below are Windows audio troubleshooting that other players report trying, in the order most commonly suggested.

Fix it, step by step

  1. Update your audio driver and relaunch the game

    Update your audio driver through Device Manager or your audio hardware manufacturer's own installer, then relaunch the game.

  2. Disable Windows audio enhancements

    Disable Windows audio enhancements: Control Panel > Hardware and Sound > Manage audio devices, right-click your playback device > Properties > Advanced tab, untick "Enable audio enhancements."

  3. Set the default audio format to 16 bit, 44100 Hz

    On the same Advanced tab, set the default format back to a standard rate (16 bit, 44100 Hz, "CD Quality") rather than a higher sample rate some devices default to.

  4. Disable inactive or duplicate audio output devices in Device Manager

    In Device Manager, disable any inactive or duplicate audio output devices so only the one you actually use is enabled — some players trace this error to FMOD grabbing the wrong device at startup.

  5. Verify Path of Exile 2's game files through Steam

    If none of the above helps, verify Path of Exile 2's game files through Steam's properties menu to rule out a corrupted install.

Hit this error? Leave a comment

Say where you are, what you see on screen, and whether any fix worked for you.

No links. Anonymous, no account. Keep it about the game.

What people are saying

Notes from players who've hit this one — no time limit, an answer from months ago is still an answer.

  • Nothing reported here yet.
← DEADLOCK-DETECTEDFAILED-WRITING-DATA-TO-DISK →

Other Path of Exile 2 error codes

Recently added