T6 P2563 stuck in limp mode.

[DXX]

@Veggisn

 

[Veggisn]

Any resolution on this as I have exactly the same thing on mine. Been nearly 6 months. Going into VW garage again Friday to try to find it.

No, I still have the same problem. Once I disconnect contact to N75 valve next to egr, limp mode disappears and vacuum pressure is much better. I tried to connect it again while the engine was running just to see how it’s behaving, but the pressure goes down to -0.3 and straight back to limp mode.

Can you please give me a update after your VW garage visit?

 

[TommyTanner]

Will do. Mines had new solenoids and actuator. Goes fine for 2-3 days, good power and pull, fine on motorway, but then once slows or around town, looses power. It then sounds rough and needs more revs. I’ve a BlueMotion and starts to play up once the stop/start kicks in. But not sure if that’s cause or effect. Then coil light, limp mode and resets once I stop and reignition.
I think I see it flashing now when it’s not even on
Will keep you updated.

 

[DXX]

No leaks. Any explanation why the vacuum pressure is good only when the N75 electronics are unplugged?

The actuator connected to the valve in question may be leaking.
Connect a vacuum pump / syringe with a gauge directly to the actuator and see if it holds vacuum.

 

[Veggisn]

Will do. Mines had new solenoids and actuator. Goes fine for 2-3 days, good power and pull, fine on motorway, but then once slows or around town, looses power. It then sounds rough and needs more revs. I’ve a BlueMotion and starts to play up once the stop/start kicks in. But not sure if that’s cause or effect. Then coil light, limp mode and resets once I stop and reignition.
I think I see it flashing now when it’s not even on
Will keep you updated

Seems like our cars can have the same issues maybe. Mine runs on idle with perfect boost pressure in 10-15 seconds, then limp mode and flashing coil light, engine light.
Thanks! Looking forward to your update.

 

[Veggisn]

The actuator connected to the valve in question may be leaking.
Connect a vacuum pump / syringe with a gauge directly to the actuator and see if it holds vacuum.

Thanks, I will give it at try when I come home from vacation .

 

[DXX]

Thanks, I will give it at try when I come home from vacation .

I suggested it back on 08 Sept.

 

[mmi]

what engine you've got - engine code?

 

[TommyTanner]

Mines a new engine. Did have the CXEB but been replaced June 2024.

 

[Veggisn]

I suggested it back on 08 Sept.

Turbo actuator and inlet actuator has been tested and is just fine. Both of them are brand new. No leaks from the hoses

 

[Veggisn]

CXFA, 150hp

 

[mmi]

CXFA, 150hp

The P2563 faulty code came for a while ago. Have now changed to a brand new turbo. P2563 still pops up

Was the P2563 reason for turbo replacement?
Is the turbo VW OEM or aftermarket?

Turbo actuator and inlet actuator has been tested and is just fine. Both of them are brand new.

What exactly is the inlet actuator - N75 solenoid valve? How they were tested? VW OEM parts?
What does turbo actuator position sensor report (voltage at the sensor) when
a) engine off
b) engine idling

Mine runs on idle with perfect boost pressure in 10-15 seconds

What's the pressure then?

 

[Veggisn]

Was the P2563 reason for turbo replacement?
Is the turbo VW OEM or aftermarket?


What exactly is the inlet actuator - N75 solenoid valve? How they were tested? VW OEM parts?
What does turbo actuator position sensor report (voltage at the sensor) when
a) engine off
b) engine idling


What's the pressure then?

P2563 and 178k km was the reason for turbo replacement. VW OEM.

It was the intake manifold vacuum unit I meant, not the actuator. Sorry!

The intake manifold is original from Volkswagen. I’ve only pressure tested it to make sure there are no leaks.

The vacuum pressure I have now is -0.8 bar when the N75 valve is not connected.

 

[Goldkamel]

I still have the same problem
Golf 7 1.6 tdi
I tried the voltage of n75 which drops from the ECU and the preheat light appears which means the signal from the ECU

 

[TommyTanner]

Latest update: new Bi-Turbo fitted as the linkage was sticking/faulty. Courtesy car for 2 months while investigating and had the van back for 1 week now. So far so good. Drives so much better. Always checking the coil light area as paranoid now though.