2012 Ford Fusion OBD2 Fuse Location: Your Guide to Finding and Fixing Diagnostic Port Issues

The On-Board Diagnostics II (OBD2) port in your 2012 Ford Fusion is essential for vehicle maintenance and troubleshooting. It’s the gateway for mechanics and car owners to read diagnostic trouble codes, check engine lights, and monitor vehicle performance. If you’re experiencing issues with your OBD2 scanner not powering up or connecting, a blown fuse is often the culprit. This guide will pinpoint the 2012 Ford Fusion Obd2 Fuse Location and provide you with the information you need to resolve potential diagnostic port problems.

Understanding the 2012 Ford Fusion Fuse Boxes

To locate the OBD2 fuse, it’s important to understand that your 2012 Ford Fusion, like many modern vehicles, utilizes multiple fuse boxes. For the components related to the interior electronics and diagnostic system, you’ll primarily be concerned with the passenger compartment fuse panel. There is also a power distribution box located in the engine compartment, which manages fuses for higher-current systems. While the OBD2 fuse is typically found within the passenger compartment fuse panel, knowing both locations can be helpful for comprehensive troubleshooting.

Locating the Passenger Compartment Fuse Box and the OBD2 Fuse

The passenger compartment fuse box in the 2012 Ford Fusion is conveniently located for easy access. You can find it under the dashboard on the passenger side. To access it, you may need to remove a protective cover, which usually requires no tools and can be done by hand.

Once you have accessed the passenger compartment fuse panel, you’ll need a diagram to identify the specific fuse for the OBD2 port. Referring to the diagram below and the accompanying fuse list, you’ll see that the OBD2 port fuse is fuse number 20.

![2012 Ford Fusion Passenger Compartment Fuse Box Diagram - Locating the OBDII/Diagnostic Port Fuse](http://techcarusa.com/wp-content/uploads/2025/02/fusebox-ford-fusion-2012-0.jpg){width=232 height=400}

This fuse is a 15A Mini fuse and is labeled in the fuse box diagram and list as “On-board diagnostic connector“. If your OBD2 scanner is not working, this is the first fuse you should check. A blown fuse will be visibly broken, with a melted or separated filament inside the fuse casing.

Here’s a table detailing the fuses in the passenger compartment fuse panel, highlighting the OBD2 fuse location for your convenience:

Power Distribution Box Location

While less likely to be related to the OBD2 port directly, it’s good to be aware of the power distribution box location. This fuse box is situated in the engine compartment. You can typically find it on the driver’s side, near the battery.

![2012 Ford Fusion Power Distribution Box Diagram - Engine Compartment Fuses](http://techcarusa.com/wp-content/uploads/2025/02/fusebox-ford-fusion-2012-1.jpg){width=400 height=177}

This box contains fuses and relays for high-power systems in your 2012 Ford Fusion. Refer to the diagram and table below for its fuse layout.

Troubleshooting a Blown OBD2 Fuse

If you suspect a blown fuse is the reason your OBD2 port isn’t working, follow these steps:

1. Locate the passenger compartment fuse box.
2. Identify fuse number 20 (15A Mini fuse) for the “On-board diagnostic connector”.
3. Carefully remove the fuse. You can use a fuse puller tool (often found in the fuse box itself or engine compartment fuse box) or needle-nose pliers.
4. Inspect the fuse. Check if the thin wire inside the fuse is broken or melted. If it is, the fuse is blown.
5. Replace the fuse. Use a new 15A Mini fuse. Ensure you are using the correct amperage and type of fuse. Important: If the new fuse blows immediately or soon after replacement, there may be a more serious underlying electrical issue in your Ford Fusion’s diagnostic system that requires professional diagnosis.
6. Test your OBD2 scanner. Plug in your scanner and see if it now powers up and connects.

By following these steps, you should be able to quickly locate and check the 2012 Ford Fusion OBD2 fuse location and potentially resolve your diagnostic port issues. Remember to consult your owner’s manual for the most accurate fuse box diagrams and information specific to your vehicle.