Turning off DTCs: Evo 8

[Dirty25rs]

How can I/Can I permanently turn off DTCs on a USDM Evo 8 like you can on subarus?

If so, what software?

If ECUflash, how?

Thanks

Sorry for the noob question.

[todd-w]

what do you want switched off , ecu periphery bits can switch most of em off

[Dirty25rs]

Cant remember the number exactly. something like P0420

My Innovate says its "Catalytic Converter Efficiency below threshold"

[todd-w]

try in ecu periphery faa bits set bit 1 to 0

[Dirty25rs]

I need to know more about what exactly i'm doing by changing that bit before I do it.

you understand....

[todd-w]

do you still have the catalytic converter and rear o2 sensor ???? im presuming you have removed the cat and now the rear o2 thinks you cat is goosed . the above switches off the rear o2 sensor but if you need obd readiness for emissions testing there another method

[Dirty25rs]

I actually still have the rear O2, I have a high flow cat. cars running on E85.

I have found the availability and pass/fail modification procedure on evolutionm.net

but my car still will throw a P0420 code on the way to the emissions place even with those bits changed, i presume.

[todd-w]

wont hurt to check them

[todd-w]

try bit 1 in Fca bits also change from 1 to 0