Key On Engine Running (KOER) On-Demand Self-Test
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The KOER on-demand self-test is an on-demand functional test of the PCM carried out with the engine running. The temperature must be above 60°C (140°F) for KOER to operate. A check is made on the fuel rail pressure (FRP) sensor, turbocharger, and exhaust gas recirculation (EGR) systems. During this test, the engine RPM may vary. The brake pedal position test is a part of the KOER on-demand self-test and must be carried out during this operation. A concern must be present at the time of testing for the KOER on demand self-test to detect a concern. If a concern is detected, a DTC is output on the data link at the end of the test when requested by the scan tool.