hey everyone. a little about me. i have a 2003 a4 1.8t quattro .. so far i have put on an afe cold air intake, magnaflow dual exhaust and just recently the stage 1 apr ecu in that exact order with probably about 6 months in between each upgrade. hours after i got the apr my cel came on so i pulled the codes and code P0299. given the upgrades including the apr i figure i blew my diverter valve but im not sure. any other ideas? im scheduled to have a new diverter valve installed tomorrow afternoon for 150 the hyperboost.

any help is greatly appreciated.

-mike

 

either ur dv your catalytic converter or o2 sensor.

 

you should do a test for leaks.

 

i put in a hyperboost dv today and the light is still on .. do i have to clear it and see if it comes back on to see if i fixed it or should the cel light go off on its own?


thanks for evertyhing guys

 

by the way he said the stock DV that a nipple piece was broken? or some part

 

so i erased the code and drove on it for about 10 miles and still no re-appearnce of the cel! would it have come back on immediaetly? i the way home from work the car was pretty quick i was surprised

 

so today the engline light came back on....any help would be greatly appreciated


paul is there anyway to tell if it is the o2 censor.. im pretty sure the catalaytic would come up as a different code and not p0299

 

check all ur vaccume lines and hoses to verify there connected properly. It could just be a leak in ur system somewhere. Hmm not sure i know there use to be a site that had all the codes and what could potentially cause them but i cant find it now. Ill keep digging. Might try to go to google and type in ur fault code along with b6 audi. if u want heres how to do a boost leak test. http://www.a4mods.com/index.php?page...tml&category=5

 

there is a black hose by the intake thats wrapped with some kind of tape


another is outlined wit tin foil?

 

here are the vaccume lines that u need to check. http://www.audizine.com/forum/showth...simplification