Test 4: Perform KOEO On-Demand Self-Test: Purpose
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of this test is to determine if PCM has detected any fault conditions that would cause a performance problem.