KOEO & KOER On-Demand Self-Test Codes
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
Record DTCs in order received. These DTCs indicate current faults in system and should be serviced in order of appearance. See DIAGNOSTIC TROUBLE CODE DEFINITIONS under QUICK TESTS to identify appropriate system test to perform.