Fault code P2563 Turbocharger Boost Control Position Sensor Circuit: Implausible Signal

[Audikiller]

Hello guys

I’m after for some help with my Audi A3 2.0 TDI 170 2010
My coil light is flashing and seems to be happening more regularly now which I guess is a good thing as maybe able narrow the fault down if it’s on all the time.

I’ve scanned the car and it is showing a fault code P2563
Turbocharger Boost Control Position Sensor Circuit: Implausible Signal

I know these are the possible problems

• Wiring and/or Connections from/to Vane Position Sensor (G581) faulty
• Engine Control Module (ECM) faulty
• Vane Position Sensor (G581) faulty
  • Binding Issues due to Adjustment/Turbocharger
  • Excessive Carbon build-up
• Vacuum Leak from/to Turbocharger (Wastegate) Actuator and Solenoid Valve for Boost Pressure Control (N75)

The car drives fine no loss of power no limp mode

I’ve read our posts on other forms no one seems to come up with an answer which is why I thought I would start my own post and hopefully finding a solution

Lucky enough I have a 2007 Audi A3 170 so I can swap around sensors for testing.

I’ve swapped the boost pressure converter sensor still the same I haven’t tried swapping any of the N75 sensors yet.
I’ve checked all the houses and haven’t seen any kinks or splits.

I have a feeling there is the sensor on the actuator can this be tested?????
I’ve seen people mentioning using VCDS and on the measuring blocks using 034.2 34.3????
My VCDS measuring blocks don’t seem to bring up the decimal point I only seem to get 034.

Basically what I’m asking is has anybody had fault code P2563 and actually managed to fix it and what did they do

Thanks for your advice and help

 

[Floenlive]

Hello,

"I’ve seen people mentioning using VCDS and on the measuring blocks using 034.2 34.3????
My VCDS measuring blocks don’t seem to bring up the decimal point I only seem to get 034. "

34.2 = Block 34 column 2 = specified boost presure
34.3 = Block 34 column 3 = actual boost presure


Make a log of the specified boost and actual pressure and post your .csv file (
advance measure value).

thx

 

[Audikiller]

Hello
I’m still Struggling with My the VCDS measuring blocks.
And I’m not having any luck uploading pictures either

 

[Audikiller]

This is what getting on VCDS measuring blocks 001-254 only
If if I’m looking at the right group number 034 then column 2 and 3 are load and lambda

 

[Audikiller]

I’m not sure if I have a turbo boost control solenoid problem everything is in the green.

 

[Audikiller]

I also have put the VCDS on put the measuring block 011 which on mine shows boost actual pressure and specified pressure
I had the car standing still revving it up also took it for a drive and it stayed within the green settings

What I don’t understand is why am I getting a fault code when all the readings are in the green
Or is it just that it’s very intermittent maybe the signal break ever so slightly from millisecond or something then sets the code off.
I’m now thinking that my next step will be to remove the manifold and turbo take the turbo off clean the Veins make sure there is no carbon buildup and also change the actuator at the same time just because it’s all off.

Now is there a setting on the VCDS to set up the turbo actuator position?????

 

[Audikiller]

I also have put the VCDS on put the measuring block 011 which on mine shows boost actual pressure and specified pressure
I had the car standing still revving it up also took it for a drive and it stayed within the green settings View attachment 163864

What I don’t understand is why am I getting a fault code when all the readings are in the green
Or is it just that it’s very intermittent maybe the signal break ever so slightly from millisecond or something then sets the code off.
I’m now thinking that my next step will be to remove the manifold and turbo take the turbo off clean the Vines make sure there is no carbon buildup and also change the actuator at the same time just because it’s all off

 

[Floenlive]

you have to make a log of channel 11 (boost specified and boost actual).
This in order to have a graph.
read this topic in the link and you do the same with only channel 11.
get the CSV file that you import into excel and make a graph with the 3 values.

https://forums.audipassion.com/topic/150074-vagcom-et-les-logs/

 

[Audikiller]

Thanks for the advice I’ll translate that link into English and post my findings.
I have had the vcds running on measuring block 011 everything did stay within the limits and was in the green (not moving and revving the engine).

 

[Audikiller]

Hello
Just an update for any follow my thread
I did some voltage checks on the G581 sensor
1) is ground
2) is output
3) is 5 volts Input

My output voltage ranged between 1.1v (no vacuum) 3.9v (with vacuum)

 

[Audikiller]

For anybody that is following my thread I eventually sent my car off to a garage super diagnostics specialist and they found the problem with my car they was running tests on the voltage and on the vaccum system around the actuator and eventually found that there was a vacuum leak down by that EGR cooler on a pipe.
What was surprising was that even with all of the testing that I was doing with pressurising vacuum pipes etc I never found that drop.
My advice If you’re 100% sure that your actuator is working and wiring is good then double triple check all of your hoses that go absolutely everywhere I never even noticed hose that they replaced.

 

[RkM2]

Hello.
Sorry for steeling your post, but since it seems like you solved your problem i hoped for some help on the same problem.

I got two fautcodes
Turbocharger Boost contron position sensore Cirut
P2563-000 Implausible signal - intermittend - Mil on and,
Cylinder two glow blug circut (q11)
P0672-000 Electrical Fault

Duo to i have moved i haven't access to alot of tools atm, so i started with what i got.
The car have run about 180 000 km og 112 000 miles.
About 25000 miles ago the previous owner got a turbo replacement due to slack in the axel. (found during service)

I checked the turbo pressure, while ilding the actual pressure is 1050 and specifiec pressure is 1040 m.bar. But while driving i see that the actural pressure is alot higher than the specified pressure.

Se picture

So i wonder if maybe there is adjustment issue on the actuator or the actuator is bad.
I will go down in the garage and look furture to se if i can find anything, later tonight, And i will look for vacume leak aswell.

 

[Paul Reames]

Do you know which vacuum pipe it was that had the leak. I have the exact same issue on my Audi TT TDI. Any help would be great i.ei a part number so I can can identify the part and check it. Cheers