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Home >> Ford >> 1984 >> Bronco II Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 2.8L EEC IV Testing >> Testing >> Reading Self-Test Codes >> Key On-Engine Running (KOER) Self-Test
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Key On-Engine Running (KOER) Self-Test

The codes shown are an Engine ID code, a Dynamic Response Code and an On Demand code. On Demand codes are the same as Continuous codes in Key On-Engine Off Self-Test. Dynamic Response code is the same as a Separator code in Key On-Engine Off Self-Test. The Engine ID code has no application in the field, and is for factory use only. The codes will be displayed in the same manner as Key On-Engine Off Self-Test codes.