Golf 7 DPF values meaning

Hello community,

I used to own a Golf 5, and for the past two weeks, I've been the owner of a Golf 7 2.0 TDI 150 hp, model year 2017.

"On my old Golf 5, when using VCDS, there were values displayed for 'load coefficient' and 'ash content'."

With the new Golf 7, so many different particulate filter values have been added that I've lost track of which one indicates how full the DPF is, unlike the Golf 5 where you had the loading coefficient and the amount of ash in the DPF, like the ash mass on the Golf 5.

I uploaded a picture so you can tell me what value it represents.

"It would be nice if someone could explain the values shown in the image to me."

Unfortunately, I don't know their meaning.

I would really appreciate your help and answers.

Best regards and stay healthy.

Please refer to the description for the value of each item.

General function and information about the DPF.

The soot is converted into ash every few hundred kilometers (when the filter is functioning correctly). So, if you're interested in the interval between regeneration cycles, then pay attention to soot.

After a (hopefully) high mileage, the filter will eventually become full of ash. This ash can no longer be converted, and the only solution is to remove it (+replace or verschandeln it). This usually happens after around 200,000 km. If you're interested in how close it is to being completely burned, pay attention to the ash content.

Regarding your specific image:
Loading limit for ash = 80g.
Current ash content = 32.4g.
So, the particulate filter has used up almost half of its lifespan. You haven't mentioned the mileage. I would expect it to be around 100,000 km. (At 100,000 km, you would theoretically calculate 100/32.4*80 = 246,000 km).

Currently, you have 13 or 22 grams of soot. If a value reaches the limit of 23.13 grams, it will regenerate. Soon enough.

Regards,
Guste.

@guste100
Thank you for your answer; you explained it very clearly.

My Golf now has 136,689 kilometers on the odometer.

And regarding the load limit for service recovery, does it regenerate at 40g in emergency situations?

And what is the loading limit? Is an overload of 50g a sign that the DPF is full of soot and needs to be regenerated immediately?

And what is the oil ash volume of a diesel particulate filter?

I would still appreciate your responses.

Golf1989 wrote:

My Golf now has 136,689 km on the odometer.

Great. Then the DPF should last for over 300,000 kilometers.

Golf1989 wrote:

And is the loading limit for service regeneration such that it is regenerated at 40g if it fails?

Okay. This means that he wants to see you at the workshop for a "emergency regeneration" if your battery drops below 40g.

Golf1989 wrote:

And the loading limit, exceeding the overload by 50g, means the DPF is full of soot and needs to be regenerated immediately?

No, that means it's then permanently overloaded, and a vehicle fire could occur during regeneration. Therefore, regeneration is no longer possible after that point, and the DPF is beyond repair. Therefore: If the car sends you to the workshop, don't drive another 1000 km, because then the workshop might not be able to do anything either.

Golf1989 wrote:

And what is the oil ash volume of a diesel particulate filter?

That's simply the volume of the ash (expressed as a volume, rather than a weight). This number may not matter to you.

Regards,
Guste.

@guste100 What else I wanted to know is...

To know when he needs to be regenerated soon, should I calculate the soot mass or measure the soot mass?

Golf1989 wrote:

In order for me to know when he needs to regenerate soon, should I calculate based on soot mass or measure the soot mass directly?

I'll quote myself here and highlight the crucial part:

guste100 wrote:

Currently, you have 13 or 22g of soot. If a value reaches the limit of 23.13g, it will regenerate.

I.e. The higher value triggers the regeneration.

You can also simply observe it yourself by logging the values over a longer journey.