Quote:
Originally Posted by 09BMW335i
thanks i have till October to get it done so I just want to be ready. But doesnt the JB4 already have this built in? or is it because i switched to Map 0 i need to install the fix?
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The JB4, Cobb, etc. prevent the cat efficiency code from triggering. This, as mentioned by others, also prevents your emissions modules from achieving their readiness states. You will not pass emissions with catless DPs without a dp fix like BMS.
I'm FBO and run Cobb just like others and successfully passed my emissions last March with BMS's dp fix.