Call of Duty Modern Warfare players have reported a Dev Error 6165 on the PC version of the game. The Dev error causes the game to crash when loading into a single or multiplayer gameplay. Based on what we have gathered, this is one of the common Dev Errors that most players have encountered and we will provide the solutions that have worked for some for your reference.

What causes COD Modern Warfare Dev Error 6165

Activision who is the developer of the successful first-ever shooter video game haven’t provided any information on what causes the error. Some have discovered that the error on their end was caused by the new GPU drivers. This is not applicable to all though as some have tried to change and use the old GPU drivers but the error still persists. There are also other factors that can cause the Dev Error 6165 which are highlighted below.

Software bug.

The unintended behavior when launching the game can be caused by a software bug that was stored over time. Bugs are the common reason when a game is acting up and developers send patches or updates to resolve known bugs.

Error triggered by third party application.

There are also instances when a Dev Error was a result of a third application that was newly installed. In this case, you need to remove the application if it is not necessary or reinstall the game instead.

Unplanned game server interruption.

Even a well-made video game like Call of Duty experiences a downtime on their server from time to time. If this is the main reason why the game crashes, then you can’t do anything but wait for the server to be fixed.

How to Fix COD Modern Warfare Dev Error 6165

Majority of players who encounter the COD Modern Warfare Dev Error 6165 were able to fix the problem based on what we have checked in the comments section in Reddit. We have selected and provided the solutions below for you to try and fix the error that hinders you to play.

Use old GPU drivers.
As most players have identified, the error started because of the latest GPU drivers in Call of Duty Modern Warfare. So all you need to do is use the older GPU drivers’ version for the error to disappear. The steps are easy and simple to follow.
-Right-click the Start Menu.
-Select Device Manager.
-Select Display Adapters to show the list of graphics cards available.
-Right-click the driver currently used.
-Select Properties option.
-Click Driver Tab and select Roll Back Driver Option.
Adjust monitor settings.
Others were able to fix the problem by adjusting the monitor from 2K resolution to just full HD resolution (1080p) instead. Try this one and see if it helps in your case.
Reinstall Call of Duty Modern Warfare.
The general solution and believed to be the most effective is to uninstall and reinstall the game. Although this solution takes time as the download size is now over 200GB on PC, the process seems to eliminate the Dev Error 6165 that the majority of users have encountered.