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Home >> Ford >> 1990 >> Bronco II 4WD, Standard, M5OD-R1 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test H - Fuel Control >> Code 42
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Code 42

HEGO indication that the fuel system was rich for more than 15 seconds when the fuel system should have been in closed loop fuel control.