KOEO & KOER ON-DEMAND SELF-TEST DTCs

NOTE: If self-test will not activate or TOOL COMMUNICATION ERROR is received, see TEST QA under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V (GASOLINE) article.

Record DTCs in order received. These DTCs indicate current faults in system and should be serviced in order of appearance. Use DIAGNOSTIC TROUBLE CODE REFERENCE CHART to identify appropriate system test to perform.