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Code P0299 Turbo/Super Charger underboost Faulty Wastegate bypass regulator valve

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Posted on Jan 02, 2017

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SOURCE: turbocharger underboost faulty wastegate bypass regulator

Sounds like a boost leak/vaccuum leak, check all hoses and ensure they are all hooked up well, and there is no leaks or cracks, if you don't find one there is ways to test this.

Posted on Mar 29, 2011

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Audi Q7 is showing P0299 eror code what is the problem and how can I solve it?


Faulty wastegate bypass regulator valve
Probable cause:
1. Mechanical damage at turbo/super charger
2. Faulty charge Air pressure sensor

Jul 21, 2017 | Audi Cars & Trucks

1 Answer

What is code , po299' on mitsubish shogun 2008


the following answer is courtsey of OBD-CODES.com OBD Codes Your OBD-II Trouble Codes Repair Site Home Trouble Codes FAQs Forums Store P0299 Turbo / Supercharger Underboost OBD-II Trouble Code Technical Description Turbocharger/Supercharger "A" Underboost Condition What does that mean? The P0299 DTC code refers to a condition where the PCM/ECM (powertrain/engine control module) has detected that the bank "A" or single turbocharger or supercharger is not providing a normal amount of boost. That could be due to a variety of reasons, which we detail below. On a normally operating turbocharged or supercharged engine the air going into the engine is pressurized and that's part of what makes so much power for an engine of it's size. If this code is set, you will likely notice reduced power output. In the case of Ford vehicles, this may apply: "The PCM checks for a minimum throttle intake pressure (TIP) PID reading during engine operation, which indicates an underboost condition. This DTC sets when the PCM detects that the actual throttle intake pressure is less than the desired throttle intake pressure by 4 psi or more for 5 seconds." Symptoms Symptoms of a P0299 DTC may include: MIL (Malfunction indicator lamp) illumination Reduced power output from engine, possibly in a limp mode Unusual sounds from the engine/turbo There would likely be no other symptoms. Potential Causes Potential causes of a P0299 turbo underboost code include: Intake (induction) air restriction or leak Failed or damaged turbocharger (sticking, binding, etc.) Faulty boost/charge pressure sensor Faulty wastegate bypass regulator valve (VW) Low fuel pressure condition (Isuzu) Sticking turbo nozzle control solenoid (Isuzu) Faulty injector control pressure (ICP) sensor (Ford) Low oil pressure (Ford) EGR system fault (Ford) Variable geometry turbocharger (VGT) actuator (Ford) VGT vanes sticking (Ford) Possible Solutions First off, you'll want to repair any other DTC codes if present prior to diagnosing this code. Start with a visual inspection. Inspect the intake air system for cracks, loose or disconnected hoses, restrictions, blockages, etc. Repair or replace as required. If the air induction system tests OK, then you'll want to focus your diagnosis efforts on the charge pressure control, diverter valve (blowoff valve), sensors, regulators, etc. Really at this point you'll want to refer to a vehicle specific detailed repair manual for specific troubleshooting steps. There are some known issues on certain makes and engines so also check out our car repair forums here and search using your keywords. For example, if you search around, you'll find that a common fix for a P0299 in VWs is to replace or repair the diverter valve or wastegate solenoid. On the GM Duramax diesel, this code may mean the turbo housing resonator has failed. If you have a Ford, you'll want to next check the wastegate regulating valve solenoid for correct operation

Read more at: http://www.obd-codes.com/p0299
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OBD II Trouble Codes Home

Aug 02, 2015 | Cars & Trucks

1 Answer

VW P0299 engine code


P0299 VOLKSWAGEN - Turbocharger Engine Underboost
Possible causes- Faulty Wastegate Bypass Regulator Valve
- Mechanical damage at Turbo/Super Charger
- Faulty Charge Air Pressure Sensor

Oct 15, 2012 | Cars & Trucks

1 Answer

Turbocharger underboost faulty wastegate bypass regulator valve


Sounds like a boost leak/vaccuum leak, check all hoses and ensure they are all hooked up well, and there is no leaks or cracks, if you don't find one there is ways to test this.

Mar 29, 2011 | 2004 Volkswagen Passat

1 Answer

I have a 2003 VW passat, its reading that cooling and turbo underboosted code, I took it to a shop that handles with foreign vehicles and they are unable to help me, I have chaged everything possible andmy...


There is a boost control valve that can cause problems. It can go bad. It has 3 vacuum hoses attached to it to change vacuum direction to turbo and wastegate valve. The boost control valve can go faulty or stick and not allow boost.

Aug 18, 2010 | 2003 Volkswagen Passat

1 Answer

Po299 turbo underboost problem


Check that the turbo's charge pipes aren't leaking anywhere. (The boost side, to the intercooler, to the manifold).

If they're not, check for exhaust leaks.

If that's not it, the turbo isn't functioning properly, or the wastegate (bypass valve) is stuck open.

Aug 10, 2010 | 2004 Dodge Sprinter

2 Answers

Code p0299 on 06 jetta


check with vw theres a technical service bulletin issued in dec o7 number 0107-70 its for code P0299 on 2006--- 2.0L turbo vw engines

Jan 21, 2010 | 2006 Volkswagen Jetta

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