Audi A4 1.9TDI AJM Error 17965 - Recurring Turbo Boost Control Issue

Question

Hello
the patient is A4 1.9TDI AJM
the car noticeably "silted up", Vag showed error 17965 "turbocharging regulation limit exceeded"
The steering wheels were cleaned two weeks ago, they were completely dirty
After cleaning, the car came to life noticeably
but now history has repeated itself, where to look for the reason????
I`m waiting for information
Regards
T

Anonymous · Answer

Tomek didn`t give you a break, one by one - underpressure (on N75), N75 himself, cooing on the blower, steady. But above all, the tongues!

tomekb · Answer

ok, thank you, I`ll start checking tomorrow N75 is new, i.e. 2 months old, but I will test the actuators

Anonymous · Answer

Electrically it will be ok, because in the errors you would have electromagnetic valve for regulating the boost pressure N75 - break/short circuit with plus or ground.

Anonymous · Answer

It would be best if you had such a manual vacuum pump, then you would check the tightness of the diaphragms in the bulb, how the arm moves from the steering wheels, and the vacuum pressures in the system.

carrot · Answer

011 -->BS and see if it moves the bar throughout the entire range

Sztomel · Answer

With the error described, there is no point in using a vacuum pump or checking the vacuum hoses and coils for tightness,
After all, the turbo overloads, so what are we talking about leaks? In this case there are only three possibilities:
- variable geometry hangs again in the max position. top-ups,
- the barbell gets stuck inside the vacuum tube,
- clogged ATMO channel in N75 or the hose leading from it to the air filter.
Stop looking for any leaks - this is not the way to solve the problem, if you notice that the variable geometry is jamming, file a complaint with the contractor - unless you cleaned it yourself

Anonymous · Answer

I got a reprieve from you. What barbell is inside the coil?

Sztomel · Answer

However, I was amused by the fact that the bleeder in the VNT does not work, my friend, and as for the barbell, it does not end or start at the pear itself, but is connected to the piston inside the pear, so I don`t know what made you laugh in my statement.

Anonymous · Answer

Nothing ever happened there as long as the membrane was tight and no oil got inside. But nothing stuck.

autoas · Answer

Yep, I also saw corroded and cracked springs in the pear which resulted in overloading

Sztomel · Answer

Maybe you haven`t had such a case, but I did, the barbell is corroded inside and jams in the plastic guide sleeve and the spring is unable to rebound it, progressive corrosion is caused by water that gets inside through the hole that equalizes the pressure inside the bar from the barbell side, the guide sleeve is visible on the barbell in the photo below, so jamming the barbell inside the barbell is quite normal and not an extreme phenomenon at all:

Audi A4 1.9TDI AJM Error 17965 - Recurring Turbo Boost Control Issue

Anonymous · Answer

It`s a fact, I`ve never dealt with something so messy.

Anonymous · Answer

Sztomel, you are right, but don`t say that such a pressure-vacuum pump with a manometer is not suitable for such things, you see what pressure and vacuum you create and you see how the bar moves, whether it jams or not, right?

Sztomel · Answer

Yes, it can be used to check the operation of the variable geometry, but you can also perform a Vag test in 011 Basic Settings or check the stroke range and possible resistances with your hand, and in the specific case described, we can only push the bar with pressure because we won`t be able to do anything with the vacuum since the bar is pulled in as far as it will go and rests against the stop on the turbocharger body.

Anonymous · Answer

I had several such cases with a reload error, I`m talking about blowers with variable geometry. And so: suspicious, stuck handlebars, so I remove the hose, connect my super pump and it pumps, the bar slides in beautifully, I remove the hose and it returns to the position it was in before. everything is fine, but no, now, generating a bit more pressure, it moves in the other direction to the end position, i.e. at 0.9 bar, the middle position wheel jams, so I`m 90% sure that the fault is with the stuck steering wheels. This shitty pump is a great device in my opinion because I check the vacuum in the system and I can control each diaphragm element.

cineklu · Answer

Tomekb, I had a similar problem, the turbo had to be cleaned, after cleaning the car came back to life, but sometimes it didn`t drive properly. It turned out that they did not delete the error from my computer (error no. 17965). A short play with the vag and the pain is over.

marfur30 · Answer

Hello, I`ll join this topic because I have the same problem 19.TDI AVB engine paste I am pasting logs from group 003,008,011. Please analyze

Audi A4 1.9TDI AJM Error 17965 - Recurring Turbo Boost Control Issue

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