My cel has come on and off for a while now a shop told me it was because of my pasport radar being hooked up to the fuse box but thats not it cuz i took that out and its still going on and off. i just replaced all of my hose clamps and i ended up leaving the lower dv hose off from the main "plastic" intake tube "oops" but that made the light go off. ironically i ran the car in my garrage once with the dv hose off and again it turned off. i qiuckly realized it was off due to excessive hissing hooked it back up and the cel stayed off for a couple days but just came back on. the dv's are aftermarket sorry not sure what kind "there purple if anyone knows off that let me know" but could that really be whats causing this? i also have a full miltek exaust and ko4'sanothershop said it was all the"air" mods that was causing it. im headin to audi tomorrow to check codes but thats all i got fornow any ideas?

 

Scan it and post the codes.

Josh