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TDI (Diesel) Emissions This is a discussion about emissions from TDI's. Pro's cons of Diesels (including biodiesel) effects on the environment and how they compare to Gasoline and other fuel sources for Internal combustion engines.

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Old May 22nd, 2020, 10:19   #1
Join Date: May 2020
Location: New Mexico USA
Default P0299 underboost

Bought car not running. DPF was plugged, deleted and installed 0.5 tune. Drove it for first time last night and no power, CEL, lots of black smoke. Obviously not making boost. P0299 came up, everything visually looks good on turbo, and hoses . Am I missing something. Decent mechanical knowledge but absolutely new to these cars.
Jodyjames is offline   Reply With Quote
Old May 23rd, 2020, 18:08   #2
Veteran Member
Join Date: Jul 2010
Location: Navarre, FL.

If I remember correctly the P0299 is the waste gate actuator on the turbo.
On the 2.0 TDI you can replace it without pulling the turbo, but you will have to work for it and bend a 10 mm wrench to fit.
There are some suggestions here about it.
Search is your friend, IIRC.
redbarron55 is offline   Reply With Quote
Old May 24th, 2020, 17:32   #3
Join Date: Jul 2017
Location: New Zealand

If you are happy you have no boost leaks and the vacuum lines are hooked up correctly, follow this video: https://www.youtube.com/watch?v=Nl66nCaOlI0
This is an excellent video from Richard, one of the members here on testing the vacuum side of the system to pinpoint where the problem is.
Will27 is offline   Reply With Quote

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