Dorman 601-621 OBD-II Data Link Module

OBD-II Data Link Module for Ford F-150

Dorman 601-621 is a direct-replacement OBD-II data link module for select Ford F-150 pickups. It restores communication between the CAN bus and scan tools or other devices that use the onboard diagnostic port, helping return vehicle systems to factory-level operation.

• Direct replacement for the original smart data link module / gateway module
• Fits select 2015-2019 Ford F-150 applications
• Female connector with one connector interface
• Black plastic housing for under-dash mounting below the steering column
• Restores communication between the CAN bus and OBD-II diagnostic equipment
• Part number 601-621 for streamlined replacement lookup

How It Works

This module sits under the dashboard below the steering column and manages communication between the vehicle network and devices connected through the diagnostic port. When the original module is affected by electrical failure or corrupted data, modules that control engine and electronic functions can stop responding. On Ford F-150 trucks, that breakdown can lead to disabled convenience features or engine limp mode. Dorman 601-621 is engineered to restore those communications to factory specifications. This part cross-references Ford (e.g., GL3Z14F642A) for the same application.

Vehicle Fitment

• Fits 2019 Ford F-150, N/A, to 11/05/18
• Fits 2017-2018 Ford F-150, N/A
• Fits 2016 Ford F-150, N/A, from 11/09/15
• Fits 2015 Ford F-150, N/A, from 10/12/15

Common Issues This Module Can Address

• No communication with the OBD-II port during scan tool use
• Loss of communication between vehicle control modules
• Electronic features becoming inoperative after module failure
• Engine limp mode triggered by network communication faults
• Diagnostic trouble conditions related to data corruption or electrical malfunction

Installation Notes

Install the module in the under-dash location below the steering column and verify the connector style before replacement. Because this part manages vehicle network communication, confirm the vehicle build date and exact fitment notes for your Ford F-150 before ordering. After installation, clear codes and verify communication with the diagnostic port and related modules. Part number 601-621 is the reference to use when matching the replacement module.

Quality Assurance

Dorman manufactures this OBD-II data link module as a direct replacement engineered to match the fit, function, and performance of the factory unit on specified Ford F-150 pickups. The design is intended to restore communication across the vehicle network and return system operation to OE specifications.