1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!!

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Thu 30 Aug 2018 11:43
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - Roy Brown

I have a 1.9 tdi Jetta 2006. I have got it from family member but when driving it home it seemed really sluggish and eventually put on the engine managment light and gave the code "P0299 - Boost Pressure Regulation - Control Range Not Reached"

I have checked for boost leaks from all the intercooling pipes but there is none there and the intercooler looks to be in good condition. I was also advised to check all Vaccuum pipes and they all appear to be in good condition. I noticed 1 was labled from the airbox so maybe another mechanic was working at it before (i did know the car had a boosting problem when I got it)

I was advised to pull the cat pipe of the turbo and inspect, it seems to have a very small amount of play on the shaft but upon reading up on this it is normal for a car with over 120k miles. I have done the Mr Muscle trick and the actuator seems to be moving a lot better but didnt make any difference.

Has anybody experienced this with these Tdi's before?

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Thu 30 Aug 2018 12:31
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - elekie&a/c doctor
Usually a problem with sticky vanes in the vnt turbo unit.
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Thu 30 Aug 2018 13:45
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - galileo
Usually a problem with sticky vanes in the vnt turbo unit.

Google "vnt turbo vanes" and it will show lots of helpful pictures.

As elekie says, this is a not uncommon problem with VAG diesels, particularly if driven gently. (The vanes then don't get full travel to clear carbon, which then builds up enough to cause sticking when full boost is required.)

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Thu 30 Aug 2018 22:58
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - Big John

Does it "shudder" when you turn it off?

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Fri 31 Aug 2018 10:58
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - 3uga

Might have a turbo that needs cleaned.
had a problem with the turbo where the compresor broke and had no power.

If you get the turbo out, expect to replace it or fit a rebuit one as the turbo might havea wear.
Also, check pneumatic actuator on turbo an turbo control valve as these tend to go bad form the heat and time

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Fri 31 Aug 2018 15:21
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - dieselnut

If someone has " LOOKED " at this problem before they may well have got the vacuum pipes crossed up while investigating.

Follow the rubber pipe back from the turbo vacuum actuator to the solenoid controller.

It should connect to the middle outlet from the solenoid controller.

It will have 3 pipes connected the solenoid controller.

The one furthest from the electrical connector is the vacuum in.

Pull this pipe off & check there is a good vacuum from the pipe with the engine running.

The next should go to the turbo actuator.

The third, nearest to the electrical conexion is just a bleed-off pipe & goes back to the air cleaner box.

If all those check out correctly check the movement on the turbo actuator rod on the vacuum actuator, there should be about 15 - 20mm of available movement there.

When you start the engine, as the vacuum builds 1 or 2 seconds, the rod should move through its full available travel.

This controls the turbo vanes which can become stuck with exhaust carbon so restricting the available travel.

Here are some vacuum diagrams which may help but may not be exactly as your engine

www.google.com/search?q=pd+engine+vacuum+diagram&a...M:

Edited by dieselnut on 31/08/2018 at 15:23

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Sun 9 Sep 2018 16:17
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - Roy Brown

Thanks for all the replies

The actuator is moving 15mm to 20mm after the Mr Muscle treatment, but as said its still very smokey. I can also see it moving when started

I had started the car today with the cat pipe off, it seemed to spit out oil or else carbon from the the cleaning, and again was smokey from here

Have also cleaned the vacuum box but it was pretty clean to start with, checked all pipes and they seem fine and also, with the one from the turbo actuator drawing in air fine.

The car was owned by an older woman, which mainly done town driving so wouldnt have had much spirited driving over the last 6 years.

Guessing if the vanes are sticking, and the turbo still isnt coming on/working after the Mr Muscle - A replacement is required now?

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Sun 9 Sep 2018 17:12
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - elekie&a/c doctor
Suggest you try this:reviveturbocleaner.com/
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Sun 9 Sep 2018 19:46
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - craig-pd130

The N75 vacuum solenoid can also fail on these engines. If it does fail, you get very little boost. Can be worth swapping with a new / known good one.

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Mon 10 Sep 2018 21:43
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - Roy Brown

Do you know where this is exactly on this vechicle? its got a vacuum box, but not sure where this valve is compared to the older 1.9 tdi's

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Tue 11 Sep 2018 12:11
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - dieselnut

" Do you know where this is exactly on this vechicle? "

Trace the vauum pipe back from the turbo vacuum actuator, it will go direct to the N75 valve.

But if the actuator is moving 15 - 20mm then the N75 valve should be ok, otherwise the actuator wouldn't move.

If you are getting oil smoke then maybee the turbo is badly worn & passing oil into the inlet/ exhaust. Check for play in the turbo shaft.

You can get turbo core replacements here but check it is the correct part No www.ebay.co.uk/itm/Turbocharger-Core-Cartridge-VW-...y

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Tue 11 Sep 2018 17:40
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - Roy Brown

" Do you know where this is exactly on this vechicle? "

Trace the vauum pipe back from the turbo vacuum actuator, it will go direct to the N75 valve.

But if the actuator is moving 15 - 20mm then the N75 valve should be ok, otherwise the actuator wouldn't move.

If you are getting oil smoke then maybee the turbo is badly worn & passing oil into the inlet/ exhaust. Check for play in the turbo shaft.

You can get turbo core replacements here but check it is the correct part No www.ebay.co.uk/itm/Turbocharger-Core-Cartridge-VW-...y

Yea i done that and it goes into a vacuum 'box', its not like my old mk4 golf which had the actual valve on the bulkhead

There is some play on the turbo shaft, but not sure if there is meant to be any movement at all on it or only some?

Thanks for the link,

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Wed 12 Sep 2018 15:39
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - dieselnut

I'm assuming that as it is a 1.9 it is a PD engine.

All the PD engined cars I have had used a N75 valve.

Even my current Passat with CR engine has a N75 valve controlling the turbo, mounted on the bulkhead. On the 1.9 they were sometimes mounted down the side of the rad.

Don't forget you said someone had worked on the faulty engine before you.

The vauum pipes may not be connected as they should be.

I think you really need to get a vacuum pipe diagram for your engine before you go any further.

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Fri 14 Sep 2018 18:03
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - dieselnut

I was in the library yesterday & they had a Haynes manual for your car.

I checked on the turbo actuator & aparently if it has a DPF there is a combined DPF pressure sensor & turbo vacuum valve mounted on the bulkhead. No diagram for the conexions though.

If no DPF, it has a N75 valve.

You said the turbo actuator was moving 15 - 20mm on startup so that puts the turbo into the maximum boost position.

So I don't really think there is any problem with the valve or turbo actuator.

There could be something mechanically wrong with the turbo not alowing it to provide any boost at all, but you could check that by disconnecting the air pipe just before the manifold then revving the engine, you should be able to feel some boosted extra airflow from the pipe.

There is a pressure sensor usually mounted on the plastic inlet pipework that measures the boost pressure & tells the ECU to inject more fuel as the pressure rises.

If this is faulty, no extra fuel so no boost.

You woud need VCDS or other diagnostic tool to check what that was outputing to the ECU

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Sun 16 Sep 2018 17:07
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - Roy Brown

I was in the library yesterday & they had a Haynes manual for your car.

I checked on the turbo actuator & aparently if it has a DPF there is a combined DPF pressure sensor & turbo vacuum valve mounted on the bulkhead. No diagram for the conexions though.

If no DPF, it has a N75 valve.

You said the turbo actuator was moving 15 - 20mm on startup so that puts the turbo into the maximum boost position.

So I don't really think there is any problem with the valve or turbo actuator.

There could be something mechanically wrong with the turbo not alowing it to provide any boost at all, but you could check that by disconnecting the air pipe just before the manifold then revving the engine, you should be able to feel some boosted extra airflow from the pipe.

There is a pressure sensor usually mounted on the plastic inlet pipework that measures the boost pressure & tells the ECU to inject more fuel as the pressure rises.

If this is faulty, no extra fuel so no boost.

You woud need VCDS or other diagnostic tool to check what that was outputing to the ECU

Thanks for that, my car doesnt have a DPF, and I have checked all the vacuum lines and they seem to go to where they are supposed too. I think you are correct about the N75 and actuator moving OK also.

The other day I took off the cat pipe, but on the V band clamp I notcied some oil. Once I removed the cat pipe I could see that there was oil inside the exhaust side of the turbo housing and some play on the shaft.

Is the air pipe you talk about the one that runs into the Intake/egr on the side beside coolant bottle etc? If so I noticed oil here also

I think I recall the pressure sensor, I did remove it and clean it but nothing, I suppose it could be swapped out for a known working one. I have a version of VCDS I must look into it

Cheers

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Mon 17 Sep 2018 17:31
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - dieselnut

" Is the air pipe you talk about the one that runs into the Intake/egr on the side beside coolant bottle etc? If so I noticed oil here also "

Yes, comes from the intercooler.

You always get a bit of oil from the turbo bearings, it's just a question of how much.

If you don't have to top up the oil frequently, probably all ok.

You will need to chech the EGR isn't stuck open, loosing all your boost.

Check with VCDS the MAF is registering changing air flow.

& VCDS again, that charge pressure sensor registers changing pressure from the turbo.

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Wed 3 Oct 2018 18:38
1.9 TDI VW JETTA 06 - P0299 - NO POWER!!!!!! - Roy Brown

2nd hand turbo fitted last week car is 100% again, internal problem with the old one

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