Turbo Underboost Error P0299
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Turbo Underboost Error P0299
I have a 2010 TDI Sportwagon and have had several times when Turbo Underboost Error code P0299 appears on my dashboard.
This mostly happens when I am at freeway speed and it causes a significant loss of power.
I can reset it as I am driving by turning off the ignition switch and quickly turn it back on.
I have been to several VW dealers and they can not pinpoint the problem.
All they say is that they can replace sensors one at a time until the error goes away. Has anyone else had this problem?
The car runs normally around town, but I am hesitant to drive it a long distance.
Thanks
This mostly happens when I am at freeway speed and it causes a significant loss of power.
I can reset it as I am driving by turning off the ignition switch and quickly turn it back on.
I have been to several VW dealers and they can not pinpoint the problem.
All they say is that they can replace sensors one at a time until the error goes away. Has anyone else had this problem?
The car runs normally around town, but I am hesitant to drive it a long distance.
Thanks
Super Moderator
Joined: Sep 2009
Posts: 2,648
From: Stoke on Trent, England
Welcome to the forum. 
As taken from my https://volkswagenforum.com/forum/ge...oftware-34973/
https://volkswagenforum.com/forum/ne...gnature-34185/
VAG Error Code: 16683/000665/11226/15343/5671/7384
EOBD II Error Code: P0299
EOBD II Error Code: P0299
Fault Location:
Boost Pressure Regulation - Control Range Not Reached/Low Boost
Boost Pressure Regulation - Control Range Not Reached/Low Boost
Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Reduced Power Output.
Limp Mode.
Malfunction Indicator Lamp (MIL)(K83) active.
Reduced Power Output.
Limp Mode.
Hoses/Pipes incorrectly connected, disconnected or leaking.
Charger Pressure Control defective.
Turbocharger faulty.
Diverter Valve faulty.
Charger Pressure Control defective.
Turbocharger faulty.
Diverter Valve faulty.
Possible Solutions:
Check Hoses/Pipes to/between Components.
Check/Clean/Replace Charge Pressure Control.
Check Turbocharger.
Check Diverter Valve.
Check Hoses/Pipes to/between Components.
Check/Clean/Replace Charge Pressure Control.
Check Turbocharger.
Check Diverter Valve.
Special Notes:
When found in 2.0l TFSI:
Check Boost Pressure Control Valve (N249), for cracked rubber diaphragm. A new/optimized Valve is available under Part # 06H-145-710-D (or newer).
Rest of World (RoW) vehicles see: Technical Product Information (TPI) 2016331 for details.
North American Region (NAR) vehicles see: Technical Service Bulletin (TSB) 01-07-70 or 2013392 for details.
When stored in conjunction with misfire codes and/or fuel trim faults see the notes associated with the following faults regarding Positive Crankcase Ventilation (PCV) failure: Crankcase Breather Valve
If the Turbocharger is faulty due to mechanical/internal problems or the exhaust system is restricted (typically the Catalyst) this fault may be the end result.
When found in VW Golf/Jetta (1K): 2.0l CR-TDI (CBEA/CJAA):
Verify the mechanical part of the Exhaust Pressure Flap Control Module (J883) is not seized or binding.
When found in Audi A4/S4/RS4/Cabriolet (8K): 2.0l (CAEB):
See Technical Product Information (TPI) 2031245/6 - turbocharger excessive waste-gate play.
When found in 2.0l TFSI:
Check Boost Pressure Control Valve (N249), for cracked rubber diaphragm. A new/optimized Valve is available under Part # 06H-145-710-D (or newer).
Rest of World (RoW) vehicles see: Technical Product Information (TPI) 2016331 for details.
North American Region (NAR) vehicles see: Technical Service Bulletin (TSB) 01-07-70 or 2013392 for details.
When stored in conjunction with misfire codes and/or fuel trim faults see the notes associated with the following faults regarding Positive Crankcase Ventilation (PCV) failure: Crankcase Breather Valve
If the Turbocharger is faulty due to mechanical/internal problems or the exhaust system is restricted (typically the Catalyst) this fault may be the end result.
When found in VW Golf/Jetta (1K): 2.0l CR-TDI (CBEA/CJAA):
Verify the mechanical part of the Exhaust Pressure Flap Control Module (J883) is not seized or binding.
When found in Audi A4/S4/RS4/Cabriolet (8K): 2.0l (CAEB):
See Technical Product Information (TPI) 2031245/6 - turbocharger excessive waste-gate play.
As taken from my https://volkswagenforum.com/forum/ge...oftware-34973/
https://volkswagenforum.com/forum/ne...gnature-34185/
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rolandor
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Jun 30, 2008 10:36 PM
