When is a differential pressure sensor dead?

Hi.

Based on which measured values is a differential pressure sensor G450 considered to be in need of replacement?

Do you have any offsets that are considered too large?
Or other, strange behavior.

"Mine has a different offset every day (sometimes 13, sometimes 9, etc.), and yesterday it surprised me while I was stationary, engine off, with a differential pressure of 2 mbar."

We've already established that these things age, not in terms of operating hours, but with the passage of time. The new location of the CRs is also noteworthy; instead of being mounted on the engine, they are now located on the body in a vibration-dampened position.

m;

Hi,

On the Golf 6 with a 2.0 CR engine, the sensor is also mounted on the engine.
I received a new sensor after the differential pressure stopped changing.
See:
Okay, I understand. Please provide the German text you want me to translate into English. I will only provide the translation.
SG

Quote:

For the Golf 6 with a 2.0 CR engine, is the sensor also mounted on the engine

?

Do you have a picture of it?

I saw him in a Golf, next to the engine!

m;

Has anyone ever replaced this part "just in case" and noticed any improvements?

I have sensors operating with offsets of 13 mbar, -9 mbar, and -15 mbar.

I think I'll get a new one and see what happens.

m;

Until the differential pressure sensor failed, I couldn't detect any abnormalities in my BRE.

Best regards, Rainer.

... and the failure occurred suddenly and unexpectedly?
... and then the part stopped working?

A badger (at the ASB - presumably a location) chewed through a hose connecting the DPF (Diesel Particulate Filter) to the differential pressure sensor.

Even then, there was no noticeable change in the way the car handled, only the engine check light was on.

Hi dieselmartin,

Here are the pictures, it took a while.
I need to correct myself; the sensor is mounted on the engine mount, not on the engine itself.
I had it wrong in my head.

SG

My sensor for the pressure die is also mounted on the injection molding machine.
In the image on the top left:
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I replaced it at the same time, just to be on the safe side, while cleaning the DPF.

It has never been defective before.http://stefan.localh0rst.net/albums/album02/IMG_0044.sized.jpg{MARKER}

After several years, the sensor is probably still working, but I noticed today that there should be a difference when the engine is not running?!?

Quote:

Address 01: Engine Control Module (03G 906 018 EM) 16:06:22 Block 067: Diesel particulate filter (exhaust values I). 106.5°C temperature before the turbocharger. 102.3°C temperature inside the particulate filter. 4.4 mbar Differential pressure, particulate filter -4 mbar offset differential pressure. 16:06:22 Block 068: Particle filter (exhaust values II) 1.1% Loading coefficient. 36.97 Ash content -12.8% Ash content. 16:06:22 Block 073: Particle filter (vehicle data) 1.0 l fuel consumption since regeneration. 21 km distance covered since regeneration. 0 h Time since regeneration

That means, yes, that he always appears fuller than he actually is .

"Should" certainly not, the question is whether the small value has noticeable effects.

I had a balancing process running after the measured pressure of 4.4 mbar.

Later, after measuring with VCDS (for a certain number of hours), the results looked like this:

Code:

Adresse 01: Motorelektronik  (03G 906 018 EM) 20:58:13 Block 067: Partikelfilter (Abgaswerte I)   26.8°C  Temperatur vor Abgasturbolader   24.4°C  Temperatur im Partikelfilter   0.0 mbar  Druckdifferenz Partikelfilter   -9 mbar  Offset Differenzdruck 20:58:13 Block 068: Partikelfilter (Abgaswerte II)   1.1 %  Beladungs- koeffizient   36.97  Aschemasse   -12.8 %  Aschelernwert         20:58:13 Block 073: Partikelfilter (Fahrzeugdaten)   1.0 l  Verbrauch seit Regeneration   21 km  Strecke seit Regeneration   0 h  Zeit seit Regeneration

What exactly does the offset do at that point? It seems to have "rounded up" and included the 4.4...?

matthiasTDI96 wrote:

What exactly does the offset do at that point, and how did it "round up" and include the 4.4...?

I thought so too.
He had an offset of -4 and an incorrectly high value of 4.4.

To correct the measurement to 0, you need to subtract 4.4 from the already calculated -4, resulting in -8.4, which is approximately 9 mbar.

I've also seen readings as low as -13 mbar.

The offset is therefore constantly fluctuating, which contradicts the concept of "calibration" or "adjustment."
Because why should I have to "pair" the sensor via login 3060 if it's supposed to constantly provide different values, and the MSTG is supposed to automatically compensate for that?

...or is it actually not supposed to fluctuate, and therefore considered "unstable" and in need of replacement?

m;

Haha.

Now it's weird again:

Code:

13:55:30 Block 067: Partikelfilter (Abgaswerte I)   60.8°C  Temperatur vor Abgasturbolader   57.6°C  Temperatur im Partikelfilter   4.4 mbar  Druckdifferenz Partikelfilter   -9 mbar  Offset Differenzdruck

That means it will result in an offset of -13 millibars.

I think there will be a new sensor next time.

There have even been instances where the pressure reached as low as -16 mbar.

Code:

10:18:02 Block 067: Partikelfilter (Abgaswerte I)   16.0°C  Temperatur vor Abgasturbolader   19.9°C  Temperatur im Partikelfilter   0.0 mbar  Druckdifferenz Partikelfilter   -16 mbar  Offset Differenzdruck