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Thread: How to disable p0420/p0430

  1. #1
    Potential Tuner
    Join Date
    Jul 2019
    Posts
    7

    How to disable p0420/p0430

    Preparing a Z06 for track use I installed a custom racing exhaust, with no catalytic converters, so now the system is throwing the 420/430 codes. What is the best way to disable those codes?

  2. #2
    you need to disable the 420/430 trouble codes, plus all other REAR O2 sensor codes.. anything for ho2 bank 1 sensor 2 and ho2 bank 2 sensor 2....
    06MonteSS

    2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, Custom paint-matched Bowtie emblems, Custom painted SS emblems, BMR strut tower brace, CAI - Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Bo White Ported/Polished throttle body, Custom DiabLew Tune

  3. #3
    Potential Tuner
    Join Date
    Jul 2019
    Posts
    7
    What should I do? Just uncheck the SES Enable box for each corresponding number?

  4. #4
    Advanced Tuner
    Join Date
    Apr 2017
    Location
    Meridian MS
    Posts
    418
    No, to disable the tests associated with the codes that run in the background and cause strange things to happen, which is what you're after, set the drop-down to No Error Reported.

    Don't forget to go through the whole list, stuff like P1482 isn't grouped together with the other codes and easy to overlook.

    Also, some of these codes may have some kind of 'super special' status and need an extra step or two before your changes will save correctly. Make your changes, CLOSE all open windows/tabs/boxes/whatever so that you have just the main program window sitting there blank, then save your file. Close it, reopen, look at the DTC list again to make sure the changes stuck.