ARC Raiders Connection Errors: The Complete Fix Guide for Online Services Unavailable, PS5 Codes, Lag, Desync, and Anti-Cheat

The ARC Raiders Connection Master Guide

You're trying to drop in, and ARC is giving you the runaround. I've been there—staring at "Online Services Unavailable," getting booted with ARSB0003, or rubberbanding so hard it feels like a slideshow. This isn't one problem; it's a class of networking and service handshake failures that all prevent you from playing. This guide consolidates every fix because the root causes often overlap. We'll go from quick wins to nuclear options.

Error Code Quick Reference

The Short List: Do These First

If you don't want the deep dive, run through these steps in order. They fix 80% of problems.

1. Check Server Status: Go to the Embark Studios Status Page or check @ARC Raiders on Twitter/X. If it's red, it's on their end—wait.
2. Restart Everything: Close the game, restart your PC/PS5, and power cycle your modem/router (unplug for 60 seconds).
3. Basic Firewall Check: On PC, search for "Allow an app through Windows Firewall." Click Change settings, find ARC Raiders and Easy Anti-Cheat, ensure both are checked for Private networks. If missing, browse to \Steam\steamapps\common\ARC Raiders\ and add ARCClient.exe.
4. Flush DNS: Open Command Prompt as Admin. Type ipconfig /flushdns and hit Enter. Then type netsh winsock reset and restart.

Solutions by Impact and Error

Start with the shared fixes, then move to your specific error.

Foundational Fixes for Everyone

These address core networking issues that cause most errors.

##### Basic Network Reset and Server Check

Applies to: All errors, especially "Online Services Unavailable," PS5 codes, desync.

1. Verify the servers are up via the official status page.
2. Power cycle your network hardware: Unplug your modem and router from power for 60 seconds. Plug the modem back in, wait for all lights to stabilize, then plug the router back in.
3. On PC, run the network reset: Go to Settings > Network & Internet > Advanced network settings > Network reset. This reinstalls adapters and resets to default.
4. On PS5, go to Settings > Network > Connection Status > Test Internet Connection. Ensure NAT Type is 1 or 2.

##### Router and Port Configuration

Applies to: Strict NAT errors, reconnection loops, persistent "Online Services Unavailable," desync.

ARC Raiders uses a range of ports for its services and PSN (on console). Forwarding these can eliminate NAT issues.

• PC (Steam/Epic): Forward TCP: 443, 3478, 3479, 3480. UDP: 3478, 3479, 4380, 27000-27031.
• PlayStation 5: Forward TCP: 1935, 3478-3480. UDP: 3074, 3478-3479, 3659.

The specific steps vary by router. Generally, you log into your router's admin page (often 192.168.1.1), find Port Forwarding or Virtual Servers, and create rules pointing to your gaming device's local IP address. Set the protocol to Both or TCP/UDP as listed.

If port forwarding is too complex, enable UPnP (Universal Plug and Play) in your router's settings. This lets the game automatically open ports. If UPnP is already on and you have issues, try turning it OFF, applying settings, then back ON.

##### Optimize Your Network for Stability, Not Just Speed

Applies to: Lag, desync, stuttering with network icon, intermittent disconnects.

Bufferbloat is the silent killer. It's your router choking on data, causing lag spikes. Test it: go to waveform.com/bufferbloat. If you get a 'C' or worse:

1. Enable QoS (Quality of Service): In your router settings, find QoS. Set it to use Bandwidth Limiter mode.
2. Set Limits: Limit your upload speed to 80-90% of your tested upload speed. Limit your download to 90-95%. This prevents saturation.
3. Prioritize Your Device: Add your PC/PS5's local IP address to the "High Priority" list in QoS.
4. Use an Ethernet Cable. If you're on Wi-Fi, this is non-negotiable for fixing desync. Use a cable.

Error-Specific Deep Dives

##### Fixing "Online Services Unavailable" and General Connection Failures

If the foundational fixes didn't work, the blockage is more specific.

1. DNS Fix: Change your DNS to Google (8.8.8.8, 8.8.4.4) or Cloudflare (1.1.1.1). On PC, do this in Network Adapter Properties > IPv4. On PS5, do it under Settings > Network > Set Up Internet Connection > (Select your connection) > Advanced Settings.
2. Disable IPv6: In your network adapter properties, uncheck Internet Protocol Version 6 (TCP/IPv6). Some routers handle IPv6 poorly, causing timeouts.
3. VPN/Proxy Conflict: Disable any VPN, proxy, or "gaming" network optimizers (like WTFast). They can interfere with the direct route to ARC servers.

##### The PS5 Error Code Trio: ARSB0003, ARCS0003, ARRT003

These are PS5's generic connection failure codes. Follow the foundational fixes first, then:

1. Clear Corrupted Game Data: From the PS5 home screen, highlight ARC Raiders, press Options, select Manage Game Content. Check for any "Corrupted Data" warnings. If present, delete and reinstall the game.
2. Rebuild PS5 Database: Power off your PS5. Hold the power button until you hear a second beep (about 7 seconds) to boot into Safe Mode. Connect your controller via USB and select Option 5: Rebuild Database. This cleans up the file system without deleting games.
3. Check for an IP Ban/Flag: If you crashed repeatedly, your home IP might be temporarily flagged. This is rare but happens. You need a new public IP from your ISP. The easiest way is to leave your modem unplugged overnight (often longer than 6-8 hours). Alternatively, call your ISP and request a new IP address.

##### Fixing Anti-Cheat and Service Failures

Applies to: Easy Anti-Cheat launch errors, services failing to start.

1. Verify Game Files:

• Steam: Library > ARC Raiders > Properties > Installed Files > Verify Integrity.
• Epic: Library > ARC Raiders > three dots > Manage > Verify.
• PS5: Follow the "Clear Corrupted Game Data" step above.

1. Repair Easy Anti-Cheat Manually: Navigate to \Steam\steamapps\common\ARC Raiders\EasyAntiCheat\. Run EasyAntiCheat_EOS_Setup.exe as Administrator. Select ARC Raiders from the dropdown and click Repair Service.
2. Add Full Antivirus Exclusions: Add the entire ARC Raiders game folder AND the C:\Program Files (x86)\EasyAntiCheat\ folder to your antivirus exclusion list. For Windows Security: Virus & threat protection > Manage settings > Exclusions > Add exclusions.

##### The Reconnection Loop Fix

Applies to: Crashing mid-match, then getting stuck in a "Connection lost" loop, losing all gear.

This is a client-server state mismatch. You must force a fresh session.

1. Do NOT spam "Reconnect." Cancel the prompt.
2. Fully Close the Game: Use Task Manager (Ctrl+Shift+Esc) to ensure ARCClient.exe and any EasyAntiCheat processes are ended.
3. Wait 10-15 Minutes. The server session needs time to fully expire on its own.
4. Before relaunching, disable all overlays (Discord, GeForce Experience, Xbox Game Bar). These often cause the initial crash.
5. Launch the game. You should connect to a fresh lobby. Your gear from the crashed session is gone—this is unrecoverable.

##### Fix Performance-Linked Networking Issues

Applies to: Yellow/red network icon paired with severe FPS drops (20-40 FPS), stuttering, freezes.

This is where network and graphics settings collide.

1. Disable NVIDIA DLSS 3 Frame Generation: If you have an RTX 40-series card, go to Settings > Graphics and turn Frame Generation OFF. In CPU/network-bound scenarios, FG creates horrific stutter. Use DLSS Super Resolution or DLAA instead.
2. Disable ALL Overlays: Turn off in-game overlays for Discord, NVIDIA GeForce Experience, Xbox Game Bar (disable in Windows Settings > Gaming), Steam Overlay (Steam > Settings > In Game), and any hardware monitoring tool like MSI Afterburner.
3. Adjust GPU Driver Settings: Open NVIDIA Control Panel > Manage 3D settings > Program Settings > Add ARC Raiders. Set:

• Low Latency Mode: Ultra.
• Power Management Mode: Prefer Maximum Performance.
• Background Application Max Frame Rate: 20 FPS (prevents GPU from boosting in menus).

Platform-Specific Paths

Windows PC Deep Dive

• Hosts File Check: Malware can redirect game servers. Go to C:\Windows\System32\drivers\etc\, open hosts with Notepad (as Admin). If you see any lines containing "embark-studios" or "arcraiders," delete them. The file should only have comments (lines starting with #) and 127.0.0.1 localhost.
• Service Check: Press Win + R, type services.msc. Find Easy Anti-Cheat and ensure its Startup Type is Manual. Right-click and select Start if it's not running.
• Run as Administrator: Sometimes it's that simple. Right-click the ARCClient.exe or your game shortcut, select Properties > Compatibility > Run this program as an administrator.

PlayStation 5 Specific Fixes

• Restore Licenses: Go to Settings > Users and Accounts > Other > Restore Licenses. This fixes authentication hiccups.
• Configure PS5 Network Manually: In network settings, when setting up your connection, choose Manual for IP Address and DNS. For IP, use your current settings but change the last digit (e.g., from .100 to .150). This can sometimes resolve IP conflicts. Set MTU to 1473 (a common fix for PSN packet fragmentation).
• Use a Mobile Hotspot for Testing: If it works on a hotspot but not your home network, the problem is 100% your home router or ISP configuration.

The Escalation Path: When Nothing Else Works

If you've done everything here, the problem is likely external.

1. ISP Routing Issue: Your Internet Provider's route to the ARC Raiders servers might have high packet loss. Test this by running a traceroute.

• On PC, open Command Prompt and type tracert production.arcraiders.com. Look for lines with high ms (over 100) or asterisks * (packet loss) before the final hop. This is proof you need to contact your ISP.

1. Contact ISP: Provide them the traceroute results. Ask about "packet loss to game servers" and if they have any known routing issues. Request they refresh your line/profile.
2. Advanced: Static IP from ISP. Some ISPs put users on Carrier-Grade NAT (CGNAT), which can cause strict NAT and port issues even with forwarding. Call and request a static/public IPv4 address (may have a monthly fee).
3. Wait for a Patch. If a specific error (like the reconnection loop) started after a game update and is widespread, the ball is in Embark's court. Report the issue through their official channels.

Your connection should now be solid. The core truth is that 90% of these errors are local—your firewall, your router, or a conflicted software setting. Methodically eliminate them, and you'll be back in the fight.