To find the correct fuse(s):
1. Consult your owner's manual: This is the most reliable source. Look for the fuse box diagrams. They'll show the fuse locations and what circuits they protect. Look for fuses labeled "PCM," "Data Link Connector," or similar terms.
2. Check the underhood fuse box: This is usually located near the battery. The fuse box cover will have a diagram showing the fuse layout. Carefully examine the diagram for fuses associated with powertrain control or the data link connector.
3. Check the interior fuse panel: Some vehicles also have fuses in the interior fuse panel, although this is less likely for this specific circuit.
Important Note: If you're having OBD trouble, it's unlikely to be a blown fuse. More often the problem is a faulty connection at the OBD port itself. Before replacing any fuses, check the OBD port for corrosion or loose wires.
If you can't locate the relevant fuse using your owner's manual and the fuse box diagrams, it's best to take your vehicle to a mechanic or an auto parts store for assistance. They'll have the resources to identify the correct fuse and circuit.
