VW T5 TDI: No Oil Temp, Only Emergency Regeneration

VW T5 1.9 TDI, Engine Code: BRR, Gearbox Code: HCY - Manufactured in 05/2006, Mileage: 163,000 km.

Hello fellow diesel mechanics,

For the vehicle mentioned above, the DPF (Diesel Particulate Filter) can only be cleaned using a forced regeneration process. A regular regeneration is not possible.
initiated. The ash content is stated to be 26 grams.

In VCDS, under "Advanced Measurement Channels," you will find the oil temperature reading.
A value of -0.9°C was displayed continuously.
Yesterday, the workshop tried a different sensor. However, it produced the same result. The positive and ground connections are reaching the connector. The oil level is indicated as approximately 31 mm.

My question is: Is the oil temperature value required for a normal regeneration start? The workshop foreman says that only the coolant temperature value is necessary.

The measured differential pressure value in the DPF is 300 mbar. However, according to VCDS, it is much higher, at approximately 900 mbar.

Thank you in advance for your assistance.

Greetings.
Hannes D. from N.

Hi, I don't see any readings here... nor do I see how they were measured.

Basically:
I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

Sure, here is the translation of the text from German to English:

"LG" can be translated as "Best regards" or "Sincerely". It is a common abbreviation for "Liebe Grüße", which means "Warm greetings" in English.

Hello,

The differential pressure of 300 mbar was determined by the workshop using an external measuring device.
The other values can be read with VCDS.
What is the easiest way to provide the remaining values?

Bitte kurze Info. Thank you.

Best regards, Hannes D. from N.

Hello,

The differential pressure of 300 mbar was determined by the workshop using an external measuring device.
The other values can be read with VCDS.
What is the easiest way to provide the remaining values?

Bitte kurze Info. Thank you.

Best regards, Hannes D. from N.

If the engine control unit (ECU) measures a differential pressure of 900 mbar, and an external pressure gauge only shows 300 mbar, then the problem is obvious.

Measurement values:
Okay, I'm ready. Please provide the German text you want me to translate into English. Just paste it here, and I will give you the translation.