Intake, Headers and Exhaust Custom Exhaust? New Headers? Need Opinions on Intakes? Discuss making your ride breathe better here.
Sponsored by:
Sponsored by:

Code P0299 (TurboCharger underboost)

Old 07-31-2016, 07:31 AM
1st Gear
Thread Starter
Join Date: Jul 2016
Posts: 1
Default Code P0299 (TurboCharger underboost)

I have had this code for several years, and nothing I do helps. I've taking it to the dealership and they informed me that it was a bad Turbo. I installed a new Turbo and the problem continues. Long story, but after installing a new factory engine and Turbo in my 2006 Audi A-3 I am still getting code P0299. The only thing I have not replaced is the exhaust. When I tap on the Catalytic converter it sounds like everything inside is broken. Can I eliminate the CAT? Could that be my problem?
Old 01-03-2017, 12:41 PM
1st Gear
Join Date: Jan 2017
Posts: 1
Cool Doubtful

If the exhaust were that clogged, your car wouldn't even run. And if your car runs, then there should be enough room to squeak enough exhaust past the turbo to spin it up for some boost; you might not get it all but is should be noticeable. Having said that, did anything get re-used from the old motor when it got put in? I've seen a little hole rip open in rubber pieces on the pressure side that can ONLY be seen under boost. Once boost is off, they close right back up and feel/look normal; but they bleed enough air to kick off the code. Also, what about the intercooler? Was that replaced? I would double check the entire pressure side for leaks before anything else. If you have to, dump a half cup of Dawn into a couple gallons of water and pour it over all the plumbing while someone builds boost and look for bubbles. I'd bet a C-note it's not your exhaust.
Related Topics
Thread Starter
Last Post
B7 Models
09-21-2017 09:50 AM
Abrie Ali
Audi A4
09-26-2015 07:54 PM
B6 Models
06-01-2010 12:29 PM
B6 Models
11-06-2009 12:22 PM
Audi A4
05-30-2006 05:11 AM

Thread Tools
Search this Thread
Quick Reply: Code P0299 (TurboCharger underboost)

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.