🔒 2018+ Chrysler / Jeep / Dodge / Ram — Security Gateway (SGW)
Starting in 2018, FCA/Stellantis vehicles include a Security Gateway (SGW) module that sits between the OBD-II port and the vehicle's CAN bus. This gateway blocks unauthorized write commands to protect vehicle systems.
✅ Works WITHOUT Bypass
- Reading all trouble codes (DTCs)
- Live data / sensor monitoring
- AI diagnosis and root cause analysis
- VIN decode and vehicle info
- Full module scan (read-only)
- Freeze frame data
🔒 Requires 12+8 Bypass Cable (~$25)
- Clearing trouble codes
- Service resets (oil life, etc.)
- Bidirectional controls
- As-built data write (in preview)
- Module coding writes (in preview)
- Any write operation
Affected Vehicles (2018+)
Jeep: Wrangler, Cherokee, Grand Cherokee, Gladiator
Ram: 1500, 2500, 3500
Dodge: Charger, Challenger, Durango
Chrysler: 300, Pacifica
Alfa Romeo: Giulia, Stelvio
Fiat: 500X
Pre-2018 vehicles do NOT need a bypass cable.
If your Chrysler, Jeep, Dodge, or Ram is 2017 or older, all features work directly through the OBD-II port with no additional hardware.
Get a 12+8 Bypass Cable on Amazon (~$25) →
Important Information About the SGW Bypass Cable
The 12+8 bypass cable replaces the connection to the Security Gateway Module, giving your OBD-II port full unrestricted access to all vehicle modules. Once installed, ScanFixAI can clear codes, perform service resets, run bidirectional controls, and access all diagnostic functions — just like a pre-2018 vehicle.
Installation: The cable plugs into the SGW module connectors under the dashboard. No cutting, no splicing — takes about 2 minutes. It can be left installed permanently or removed when not in use.
Disclaimer: By installing a bypass cable, you are removing the factory Security Gateway protection from your vehicle's diagnostic port. Please be aware of the following:
- Warranty: If your vehicle is still under factory warranty, the dealer may consider this a modification. We recommend removing the cable before dealer visits if warranty coverage is a concern.
- Emissions Testing: In some states, emissions inspections check OBD-II connectivity. The bypass cable should not affect this, but if you experience issues, temporarily reinstall the original SGW connection for testing.
- Cybersecurity: The SGW was designed to prevent unauthorized CAN bus access. With the bypass installed, this protection is disabled. The real-world risk is very low for most owners, but you should be aware of it.
- Vehicle Operation: The bypass cable does NOT affect how your vehicle drives, starts, or operates. The SGW only controls diagnostic port access — it has no impact on engine, transmission, safety, or any other vehicle system.
ScanFixAI provides this information for educational purposes. The decision to install or remove a bypass cable is the vehicle owner's responsibility. ScanFixAI is not liable for any warranty, emissions, or security consequences resulting from SGW bypass installation.