Understanding Question N75 (SOLVED)

Vehicle: Audi A6 4F BLB

Error:

Code:

2 Fehler gefunden: 16627 - Magnetventil für Ladedruckbegrenzung (N75): Unterbr. / Kurzschluss nach Masse             P0243 - 000 -  -              Umgebungsbedingungen:                     Drehzahl: 3024 /min                     Drehmoment: 164.0 Nm                     Geschwindigkeit: 151.0 km/h                     Last: 46.3 %                     Spannung: 13.76 V                     Binärwert: 00101000                     Druck: 1825.8 mbar                     Druck: 1621.8 mbar 16629 - Magnetventil für Ladedruckbegrenzung (N75): Kurzschluss nach Masse             P0245 - 000 -  -              Umgebungsbedingungen:                     Drehzahl: 882 /min                     Drehmoment: 28.0 Nm                     Geschwindigkeit: 0.0 km/h                     Last: 0.0 %                     Spannung: 12.62 V                     Binärwert: 00101111                     Druck: 1030.2 mbar                     Druck: 958.8 mbar Readiness: 1 1 0 0 0

I ordered this part based on the part number.

A valve with the part number 1K0 906 283A was delivered. This valve is also installed, but it's a standard valve that simply opens and closes. I still exchanged it, of course, but it was unsuccessful.

If I'm not mistaken, the N75 is a pressure sensor that regulates the boost pressure, or is it not ?

This part should have the part number 8E0 906 627 C.

Is the N75 a pressure sensor or just a valve? Akte displays both variations when searching for "N75".

BM wrote:

If I'm not mistaken, the N75 is a pressure sensor that regulates the boost pressure, or am I wrong?

It's the interface component that converts electrical signals to pneumatic signals within the boost pressure control loop.

Quote:

Is the N75 a pressure sensor or just a valve?

A valve that, through PWM control, becomes a "stepless" pressure sensor.

I would be more concerned about the strange values in the second [section/column/etc.]. Make mistakes.
It looks like it's idling, but it's showing significant pressure differences.

Am I reading something wrong?

m;

Quote:

A valve that, through PWM control, becomes a "stepless" pressure transducer.

I am aware of that. It's about the selection of the spare part.

According to the and according to the file, there are 2 possibilities.

1. Solenoid valve 1K0 906 283 A.

2. Pressure sensor 8E0 906 627 C.

According to the wiring diagram, there is only one N75 component. Therefore, a part of it is definitely wrong.

The error message description (for the solenoid valve) is also confusing me.

I have now ordered the "pressure transducer" as indicated in the documentation. Let's see what happens.

Quote:

I would be more concerned about the strange values in the 2nd. Make mistakes. It looks like idle, but it's showing significant pressure differences.

I will take care of that once the N75 error is resolved. Who knows...?

The 8E0 connects to the EGR system, specifically the EGR cooler.
That's probably not it .

m;

Quote:

The 8E0 goes to the EGR - more precisely, the EGR cooler.

No idea. I had the valve yesterday, somewhere between the door and... Fishing rod exchanged.

If that is the case, the problem is likely to be in the wiring harness or somewhere else, and the new valves were just for show.

Let's see.

Hello,

"The pressure transducer" is a solenoid valve that can be controlled via PWM or similar methods, allowing it to operate in a range of states, not just fully open or fully closed.

Actually, it's the same, depending on the definition .

Best regards, Rainer.

Bugs fixed. Air quality readings are also again within reasonable ranges.

The part N75 is referred to as pressure transducer 8E0 906 627 C and provides vacuum pressure to the turbocharger directly, without any intermediate steps.

In the repair manual and the fault code memory, it's referred to as the "boost pressure control valve - N75." Whatever the reason...

The term "boost pressure limitation" instead of "boost pressure regulation" has further confused me.
I thought it might be an additional valve to limit the pressure, kind of like an emergency shut-off for boost pressure. Unfortunately, it was too ambitious.

Nevertheless, thank you for your efforts.

Quote:

N75 is the part number for the pressure sensor 8E0 906 627 C

.

I saw it differently with the 4F. That's the 8E0 connector going to the switching valve of the EGR cooler.

Okay, but only if it works again.

Greetings.
m;

Quote:

That's the 8E0 connection to the switching valve of the EGR cooler.

Where did you see that?
If it appears that way, it's likely an optical illusion or a bug.

The supply line is likely the same one used for the EGR switching valve.