Vw t6 cxfa p0299

[Chubby]

Hi I am wondering if anyone can help
I have vw t6 cxfa engine dsg
I have had a few problems with eml on
Different codes. Had loss of power. P2279 Air intake leak detected, and p13d6 cylinder 3 inplausible pressure signal.
I did smoke test. No leaks present.
So changed air flow meter. Genuine
the glow plug was changed 7 months ago along with the other 3. Genuine parts it felt better. But not 100% but didn't give me any codes. Untill I done long distance approx 100 miles. P0299 turbo underboost.
I have also checked both the egr pipes front and back. Rear one was changed last year. No leaks here either re tested with smoke machine. No visable leaks.
Is there any thing I am missing.
Or is it just a faulty turbo.
Thanks

 

[mmi]

I would start by verifying boost pressure sensor readings - engine stopped should read the same as ambient air pressure.
Then verify that the turbo actuator runs freely from end to end.

These threads might be useful

For the boost pressure sensor​

P

Thread 'Fault code help please'

16 Sep 2021

Hi guys I have the fault code as listed below and have changed the sensor but still have the fault code showing after reset. I have no loss of power or any other problems apart from the waring lights. would anybody have an idea of what to try next, Thanks.

• paul61
• p0236 p0237
• Replies: 15
• Forum: VCDS-VagCom / Carista / OBDeleven

Turbo actuator testing​

Thread '[T6_measured] 01-Engine - Built-in tests for turbocharger'

13 Oct 2024

01-Engine - Basic Settings​

IDE00457-Test of turbocharger​

HOW-TO​

Engine running​

VCDS > Select > Engine > Basic Settings > IDE00457-Test of turbocharger​

Select "Measuring Values" ​

Pick up e.g. the following data items for monitoring:

IDE00021 Engine RPM​

IDE07736 Turbocharg.2 compress.outlet: press.sensor 1 bank 1: raw value (bi-turbo only)​

IDE07738 Charge air cooler inlet: pressure sensor 1 bank 1: raw value​

IDE07783 Turbine actuator 1 bank 1: posit.feedback - Raw voltage​

IDE07784...​

• mmi
• t6_measured turbo vcds
• Replies: 8
• Forum: Engine, Gearbox, Exhaust, Drivetrain

• 
• 

Fault diagnosis​

M

Thread 'Fault code P0299 Boost - 2019 Crafter'

29 Jun 2024

Hi , i have a PO299 underboost issue i cant get to the bottom of.
i have borrowed a copy of VCDS and ran the codes, its has stated as follows :

vw crafter 2.0 - daua 2019 fwd
drives fine98% of the time, but suffers a po299 underboost when crusing at about 65mph.
drive fine under soft driving, drives fine under heavey footed driving, just doesnt like cruising or easing off ?

i have so far,
tested the vacum to n75 - 25mmhg
tested the vaccum line to turbo - it holds at 20mmhg
replaced the N75 valve
inspected all vac hoses, which seem fine.
looked that the waste gate actuator, it seems to...

• MB999
• crafter dpf fault codes
• Replies: 116
• Forum: Crafter Corner