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my 94 has no cats and runs great i got true dual exhaust with some random mufflers not loud enough for my flowmaster 10 series on there way but i dont throw no codes for the O2 sensor. most obd1 vehicles run without cats and no codes. obd2 vehicles have the sensors pre cat and after cat.
i pulled codes 725,386,and 321 on the bronco.can any one tell me what these are,and where i can find a list of codes? any help would be greatly appreciated.
