MTA:SA anti-cheat code
MTA:SA anti-cheat code AC#2
MTA's anti-cheat lists this number under DLL corruption.
How to fix it
Use the official client and clean game files
Install MTA from multitheftauto.com and keep GTA unmodified. Trainers, injected DLLs and patched game files are exactly what these checks look for.
Repair your MTA installation
Run the current installer from multitheftauto.com over your existing installation. It replaces MTA's own files without touching your settings.
Read the whole message, then the official page
The number names a detection category, not a program on your computer. MTA's anti-cheat guide lists what each category covers, and the full message is what tells you which case you are in.
If you were banned, appeal where it was issued
A server ban is appealed on that server. An MTA global ban is appealed through MTA's own process. Keep the full message: it names who issued it. On CIT, appeals are posted on the forum, not in game: a ban, limit ban, fullmute ban or a mute over 3 days goes to the Bans Issued board (cit.gg/index.php?board=626.0), other punishments to the Punishment Appeals board (cit.gg/index.php?board=600.0). If you cannot use the forum, ask someone to post it for you.
Still not fixed? Copy the whole message, not only the code, and check your log in the Fix tool. It is read on your own computer.
About this code
A damaged or replaced DLL in the game or MTA folder can raise it, which is why a clean installation is the first thing to check.
AC is one of MTA's three anti-cheat prefixes. The number names a published detection category. MTA's own guide says a detection does not prove intent, and it does not list every detector. MTA's own documentation gives AC#2 as DLL corruption.
All fix guides · Every MTA:SA error code · Crash codes and offsets
Where this comes from
Read on 5 September 2026 and written in our own words here.