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  1. 04-25-2023 07:23 AM #1
    jordanmartin74
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    Catless Downpipes with DS1 Stage 2 Codes

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    Current Build: 2018 S6 4.0TT
    TS1 Turbos and waste gate actuators
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    SMR Long Tube intakes
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    AWE Touring Exhaust
    Upgraded Turbo Oil Lines
    AMS Alpha Turbo Cooling System

    I'm currently running a DS1 Stage to and the car has started throwing codes related to the Cats. Can anyone advise on what need to do to get them sorted.
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  2. 04-25-2023 07:23 AM #2
    Marcothelab
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    You need to get a custom tune and have your tuner tune out the downstream o2 sensors.
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  3. 04-25-2023 07:47 AM #3
    jordanmartin74
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    Quote Originally Posted by Marcothelab View Post
    You need to get a custom tune and have your tuner tune out the downstream o2 sensors.
    Anyone you recommend?
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  4. 04-25-2023 11:17 AM #4
    MattyMarkey
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    Quote Originally Posted by jordanmartin74 View Post
    Anyone you recommend?
    Not many, if any, tuners will mess with that anymore; the risk of EPA fines is too real now

    Try J-spacers first


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    2013 Q7 / Prestige / Mugello Blue Pearl

    2014 S7 Phantom Black on Black / B&O / DS1 ECU Stage 2 / SRM TCU tune / RS7 Inlets & Airbox / JXB Carrier / 034 Drivetrain Inserts / Cooling mods coming - SOLD

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  5. 04-25-2023 11:18 AM #5
    MattyMarkey
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    Quote Originally Posted by MattyMarkey View Post
    Not many, if any, tuners will mess with that anymore; the risk of EPA fines is too real now

    Try J-spacers first and make sure the sensors are in the correct locations.


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    2013 Q7 / Prestige / Mugello Blue Pearl

    2014 S7 Phantom Black on Black / B&O / DS1 ECU Stage 2 / SRM TCU tune / RS7 Inlets & Airbox / JXB Carrier / 034 Drivetrain Inserts / Cooling mods coming - SOLD

    2016 A6 3.0T / Premium + / Glacier White on Black / S-line / Sport Package w/ 20" wheels / No Mods - TOTALED
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  6. 04-25-2023 02:13 PM #6
    Quimicax
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    Quote Originally Posted by jordanmartin74 View Post
    Anyone you recommend?
    https://www.audizine.com/forum/showt...nerRT-Pro-Mods Read This Post
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  7. 04-26-2023 10:33 AM #7
    MTV10
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    I had my tuner code it out.
    2018 /S6 | Mythos Black / Arras Red | Stage II ECU | APR TCU | ARM Downpipes | AWE Touring Exhaust | SRM Intakes | CETE Lowering Module | 034M DSG Mount Insert | HRE P43SC
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  8. 04-26-2023 10:56 AM #8
    MattyMarkey
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    Quote Originally Posted by MTV10 View Post
    I had my tuner code it out.
    And you didn’t want to name drop? Wonder why haha


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    2013 Q7 / Prestige / Mugello Blue Pearl

    2014 S7 Phantom Black on Black / B&O / DS1 ECU Stage 2 / SRM TCU tune / RS7 Inlets & Airbox / JXB Carrier / 034 Drivetrain Inserts / Cooling mods coming - SOLD

    2016 A6 3.0T / Premium + / Glacier White on Black / S-line / Sport Package w/ 20" wheels / No Mods - TOTALED
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  9. 04-26-2023 12:09 PM #9
    THCarpenter
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    Quote Originally Posted by MattyMarkey View Post
    And you didn’t want to name drop? Wonder why haha


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    hes up in Canuck land....so Im not sure on their EPA listings
    2016 S6 Mythos Black / B&O, Cold Weather, Drivers Assistance, Black Optics
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    "How to spend a shitload of money and still be slow, the THCarpenter story." - sepheroth86
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  10. 05-18-2023 10:43 PM #10
    S8King
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    anyone needing this service message me,
    anyother file enchanements , pops and bangs, flames, 4 bar sensor ecu config, etc
    catless downpipes correction, must be used on race track or off road use only. DS1
    Euro Star Performance winston-salem NC

    - - - Updated - - -

    anyone needing this service message me,
    anyother file enchanements , pops and bangs, flames, 4 bar sensor ecu config, etc
    catless downpipes correction, must be used on race track or off road use only. DS1
    Euro Star Performance winston-salem NC
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  12. 05-20-2023 05:25 AM #11
    Kraut PSI
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    Question. If you tune out the rear O2's. Will the car show them as "not ready" when it comes to inspection time?
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  13. 05-23-2023 04:27 PM #12
    WhiteDiamond
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    Quote Originally Posted by Kraut PSI View Post
    Question. If you tune out the rear O2's. Will the car show them as "not ready" when it comes to inspection time?
    I have been searching for this answer as well.
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  14. 05-23-2023 07:35 PM #13
    Marcothelab
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    Quote Originally Posted by Kraut PSI View Post
    Question. If you tune out the rear O2's. Will the car show them as "not ready" when it comes to inspection time?
    Yup


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