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No CEL but OBDII says otherwise

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Well I have a weird issue, it smells like my cars running pretty rich because it smells like gas alot, expecially on startup(just like my dads 4runner with a rusted cat.) I used a cheap obd2 reader and the C(catalytic) light was blinking, the O(oxygen sensor) and EGR light were blinking. I dont have any CEL codes whatsoever so what could this mean? I kind of hear a exhaust leak somewhere near the doughnut gasket near the midpipe or near the cats.:confused:
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