Thread: po140 pre or post cat??

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  1. #1 po140 pre or post cat?? 
    SE Level Member scooz14's Avatar
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    like the title says

    is this code for the upstrem or downstream 02 sensor

    matt
    12.591@108.00 1.95 60'
    329.9hp 400.1tq
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  2. #2 Re: po140 pre or post cat?? 
    SS-DD Level Member IndeedSS's Avatar
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    Downstream or after the cat. Common code for those with Hi-Flo cats

    P0140..fwiw
    04 Indy SS build #972 - Traded
    2010 Camaro SS LS3
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  3. #3 Re: po140 pre or post cat?? 
    Donating Users jacobmh27's Avatar
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    If you put a hi flow cat on and you get this code how do you pass inspection for OBDII
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