Audi 2009 2.0 TDi P0299 fault code saying Turbo charger under boost!! Please help?

[MSS3]

Hi,

I've had the glow plug light flash on and off on my Audi after a few miles on a run with a loss in power (vehicle still drives just flat) once the engine management light has come on however this has been reset and a code of P0299 has been read on a VCDS.

The car has been checked by another Tech today who comes up with the same code and information along the lines of Turbo Charger under boost, Permanent.

Any help or advice would be much appreciated please?

Manny,

[MSS3]

Hi I've had some advice one saying it may be Turbo and another saying could be the actuator,

Any more advice please or to where I could go in and around the Birmingham area please?

[a8 tech]

Vacuum depletion from collapsed pipe under load, you need a boost reading and vacuum line pressure prior to looking at the turbo as turbo's rarely fail but often replaced

Again load it up in third gear not at idle due the rev limiter function

Engine code would be helpful as well IF ITS A 2.0 PD THEN MOST LIKELY TO BE THIS ( vacuum unit of intake manifold ) IF FITTED, THESE UNITS FAIL AND DEPLETE VACUUM

SEE ATTACHED PHOTO

Check this

Check air filter and boost pressure system (seal)

Check boost pressure sensor and accelerator pedal to make sure values are plausible

Data block 10: Check boost pressure sensor against the atmospheric pressure sensor of the engine control unit

(must be less than 50 mbar difference )

Data block 2: 99-100% has to be achieved in the pedal movement sensor test, when the accelerator is slowly depressed.

Basic setting, exhaust return valve and boost pressure controller:

Basic setting 03: Check exhaust return valve

Basic setting 11: Check boost pressure of exhaust turbocharger. Check vacuum control unit (ATL) with hand vacuum pump

guide vane setting moves from 100 - 200 mbar, maximum setting is approx. 550 –650 mbar.

Check synchronisation angle VALVE TIMING !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Data block 4/4: Check setpoint value +/- 3° for synchronisation angle/valve timing. If outside the tolerance, check valve timing and adjust.


GOOD LUCK

[MSS3]

Thanks for the info A8 Tech.

[MSS3]

forgot to say it's the latest common rail engine not the PD,

[a8 tech]

there is a problem with the waste gates on the cr

[a8 tech]

forgot to say it's the latest common rail engine not the PD,

see your pm box

[ams4]

Any update on the issue. My CEL came on yesterday. I didn't notice a loss of power with the light...the only thing that happened, which might just be a coincidence, is the A/C suddenly blew hot for a few seconds, the CEL came on, then cold air again. Took it to the dealer. When they called they didn't say exactly what the fault code was, but that the car needs a new turbo assembly. My vehicle is an '09 A4 2.0T with 67k miles on it. I'm waiting to hear back, the service tech said he wanted to talk to his GM about it. Any ideas? Is there a known problem with the turbo assembly for this vehicle? Any info would be greatly appreciated! Thanks.

[turpal]

My mates Passat 10 plate has the same problem,CR engine and the same code.So waste gates are problems on these are they?I can tell it opens using a vacuum.

[D_MACD_1979]

Does anyone know if the vain actuator should have fluid in it if so what fluid is it if not then it must have got in when I done the head gasket Thanks in advance David

[Gorman]

Hi Guys,
Just had P0299 fault code on my 2008 Eos DSG, 80,000 miles keeps going into limp mode, comes out of limp when turned off and restarted but is down on power.
The code is very ambiguous so any help would be gratefully received

[g60dave]

Gorman - how did you get on?

[PetSKi]

CBBB engine on A3 Sportback. First warm day of summer and noticed, the AC was u/s. Have had this emissions ECU recall active and was to get reprogramming scheduled on Tue. Got the blinking glow plug lit on Sun (Engine addjustment failure). Then turned engine off and restarted and it was gone to be blinking again right the next run with continuous Exhaust control failure indicator (Engine icon), which didn't go away. Day before the failure I had driven long run at 130+ km/h and ESP/ASR Off for a couple short runs on gravel.

Took the car to the dealership for the ECU update, but as it is, engine fail active, they couldn't update it. Error code is P0299, continuous underboost. AC was refilled and works now fine, but they couldn't find the actual failure on the engine. Checked the vacuum tubing and the actuator bell, which had been defined to be OK. They said, it could still be the actuator, but didn't have a spare at hand. So they couln't do anything before next morning.

A bit puzzled at the moment hearing controvercy information on how to continue. They figured that culprit might still be a faulty magnetic valve, but wasn't certain on it. That's however, what they would have tried to change, but recommended to schedule new check with electronics specialist. I need the car daily and could not afford it to stay at maintenance overnight.