2016 3.5EB p0420& p0430 codes for Banks 1 & 2 catalyst sytem efficiency below thold.

2016 3.5EB p0420& p0430 codes for Banks 1 & 2 catalyst sytem efficiency below thold.

This is a discussion on 2016 3.5EB p0420& p0430 codes for Banks 1 & 2 catalyst sytem efficiency below thold. within the F150 Ecoboost Performance forums, part of the F150 Ecoboost Garage category; Running a set of Full Race catted downpipes. 8k miles since install. No issues with DTC codes/CEL til now and they return immediately after being ...

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  1. #1
    Ecoboost Sr Member 00bullitt's Avatar

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    2016 3.5EB p0420& p0430 codes for Banks 1 & 2 catalyst sytem efficiency below thold.

    Running a set of Full Race catted downpipes. 8k miles since install. No issues with DTC codes/CEL til now and they return immediately after being cleared.

    Thought maybe there was an issue elsewhere. How do you test for this?
    2016 F150 XLT SCREW 4x4 (Ingot Silver) Sport Package, 5.5' Bed
    3.5L EcoBeast

    6" BDS lift with Fox Coilover
    35x12.50-20 Nitto Ridge Grappler
    20"x10" XD825 Buck's with -24 offset
    Diamondback Bed Cover - Black
    DeeZee Rubber Bed Mat
    Bully Dog BDX with 5 Star Tunes
    AFE Stage 2 CAI
    Full Race Catted Downpipes, Factory Exhaust with Corsa Tip
    Sport Grill-Body Color Matched
    Husky Floor Liners
    Headlight Revolution SuperNova v3 Lo/Hi/Fog LED's


  2. #2
    Ecoboost Jr Member Thestreaker's Avatar

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    I got those codes almost immediately after I installed my Mbrp catted pipes. I ended up buying a set of defoulers on amazon for $15 and cleared the codes and they haven't been back in 5k miles. Not sure why yours took so long to show up but I'd recommend getting the defoulers.

    Sent from my SM-G965U using Tapatalk

  3. #3
    Ecoboost Sr Member 00bullitt's Avatar

    Join Date
    Apr 2016
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    2016 F150 XLT SCREW 4x4 (Ingot Silver) Sport Package, 5.5' Bed
    3.5L EcoBeast

    6" BDS lift with Fox Coilover
    35x12.50-20 Nitto Ridge Grappler
    20"x10" XD825 Buck's with -24 offset
    Diamondback Bed Cover - Black
    DeeZee Rubber Bed Mat
    Bully Dog BDX with 5 Star Tunes
    AFE Stage 2 CAI
    Full Race Catted Downpipes, Factory Exhaust with Corsa Tip
    Sport Grill-Body Color Matched
    Husky Floor Liners
    Headlight Revolution SuperNova v3 Lo/Hi/Fog LED's


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