Khalidss

I install down-pipe before 1 week but it show check engine light
i delete the code by jb4 but after 2 or 3 hour it show check engine light again

the are way to programmed by jb4?
did the oxygen sensor extender adapter enough to delete the check engine ?

TModelle

It looks like the extender did not work in your case.

a) try a different brand or design of extender.
b) get a tune with downstream lambda delete.

RichardCranium3

And more specific, no, it cannot be deleted via JB4.

Trekt43

I believe it can be deleted by the JB4 automatically (it basically clears the code every time it pops up), but not on the US version of the software (it doesn't meet US laws). You can spoof your location and install JB4 software and it should have the auto-clear option. I haven't done this personally but there are posts describing it.

MatthewJ

Still doesnt always work, or work for all cars.
I was able to get rid of the P0420/P0430 codes with the spacers, but i occasionally will get a rich condition on bank 1 (P2097), not sure why only one side but its easy to reset.