KOEO & KOER Self-Test Codes

WARNING: This page is about a different car, the 2002 Ford Pickup and 2002 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: KOER and KOEO self-tests cannot be performed in ALT fuel mode.

Record DTCs in order received. These DTCs indicate current faults in system and should be serviced in order of appearance. If KOEO or KOER DTCs are retrieved, see DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article to identify appropriate system test to perform.