Diagnostic Trouble Code Retrieval
WARNING: This page is about a different car, the 2014 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
Generally, a good diagnostic strategy is to resolve all on-demand codes related to the system concern. Retrieving all continuous DTC s can also be beneficial to understand historic issues or issues outside of the suspect system that may be affecting your concern. On-demand testing should be done to ensure the fault represented by a continuous DTC is still present.