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Thread: engine diag fault class has way more choices now-confusing

  1. #1

    engine diag fault class has way more choices now-confusing

    with the latest version 4.10.4, under the DTC fault list, there's more options now than before in the drop down list:
    disabled
    misfire detest (mil blink)
    misfire detect (mil on x cycles)
    mil on (x cycles)
    mil on (after 5 seconds)
    mil off (stored fault)
    mil off (remove after x cycles)
    fault with service-tester
    misfire detect (mil, no blink)
    fule supply system
    driveability fault (non emiss.)
    driveability fault (emiss.)
    mil on (after 5 seconds)


    For example, if i want to disable the 0420 but still have it ready to pass emissions, which one do i pick now?
    Last edited by fst100; 09-13-2021 at 12:24 PM.

  2. #2
    Bump, anyone?

  3. #3
    Potential Tuner
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    Quote Originally Posted by fst100 View Post
    with the latest version 4.10.4, under the DTC fault list, there's more options now than before in the drop down list:
    disabled
    misfire detest (mil blink)
    misfire detect (mil on x cycles)
    mil on (x cycles)
    mil on (after 5 seconds)
    mil off (stored fault)
    mil off (remove after x cycles)
    fault with service-tester
    misfire detect (mil, no blink)
    fule supply system
    driveability fault (non emiss.)
    driveability fault (emiss.)
    mil on (after 5 seconds)


    For example, if i want to disable the 0420 but still have it ready to pass emissions, which one do i pick now?
    Did you ever figure this out? I?m currently dealing with the same question.

  4. #4
    unfortunately not. my gut tells me it may be due to the emission and EPA stuff that prohibits it for specific models and years. for example, it doesnt come up in the P0411 pcms found in the ls1s but my 2006 saab 93 and 2010 hhr ss has this come up.

  5. #5
    i ***think*** i found which one is the one that works. still putting miles on the car to get the emission readiness to all turn from incomplete to complete.

  6. #6
    just to update this thread, if you select mil off (stored fault) it'll put whatever dtc that would emit the DTC light to just pending which, in my case in PA, is acceptable. for example, i have a p0420 catalyst efficiency low and switching it to "mil off (stored fault)" it allowed the emission readiness go from incomplete to complete after a few key cycles and driving steadily in the 50-70mp range as per GM driving cycle. i also switched other B1S2 codes to the mentioned selection and the O2 heated and such also switched to complete.

    edit-i had mentioned this was with a 06 saab aero auto 6-speed. in order for the obd readiness to read correctly i had to drive the gear selector in D and not in tiptronic for whatever reason. i tested it over a course of couple hundred miles of driving over the course of a few days of commuting to work.