Error entry for a decommissioned AGR at PD?

Hello,

while reviewing old articles regarding I noticed that disconnecting the AGR (disconnecting the hose from the vacuum valve) is supposed to trigger an error message in the fault memory (for PD engines).

Does disconnecting the AGR valve have any negative effects on the engine control unit or other components?
Is the error persistent, or does it disappear when the device is reconnected?

Greetings

Rudi

delvos wrote:

Does disconnecting the AGR (Exhaust Gas Recirculation) have any negative effects on the engine control system or anything else?

Besides having to switch off the power for the warning light (and the driver then being unable to distinguish any further errors), I don't know of any others.

Quote:

Does the error persist, or does it disappear when the device is reconnected?

Not immediately, the lamp also only turns off after a few trips.
The error is likely to remain in memory for a longer period, probably the usual 50 engine starts.

But not all PDs react to AGR defects with error entries...

But not all PDs react to AGR defects with error entries. . .

Only those that are OBD-II compliant according to the vehicle registration document...

Thank you for the answers!

Julian wrote:

Only those that are OBD-II compliant according to the vehicle registration document...

Does the term appear literally or in an encrypted form in the document/letter? I have never paid attention to it

The Passat 3BG should actually be OBD-II compatible, right?

I know someone who owns an A4 with an AVF engine (manufactured in 08/03) that is already OBD-II compatible. AGR is almost impossible to defeat.

See document No. 5.

Under 5, it says "Diesel-D 22".

My document, however, is a bit different from the usual one, since the car is a re-import.
There is no mention of OBD.

Then, after disconnecting it, there won't be any Christmas decorations

In case of emergency, there was a fake device for Ulf and/or Garth Brooks that would suppress the LMM signal, so that the STG wouldn't make any noise...

edit: I see now that the year should not cause any errors!

Under '5' on my list, it says 'Diesel-D 22'.


Then it goes smoothly...

Julian wrote:

Do you know someone who owns an A4 with an AVF engine (manufactured in 2008/03) that is already OBD-II compatible? AGR is almost impossible to stop.

However, with simultaneous adaptation of Channel 3 to Maximum, it could work... have you already tried it?

Julian wrote:

Under "Diesel-D 22" on my device, it says "Diesel-D 22". delvos wrote: Then it goes smoothly...

That also appears in my system, but with the ...019CR STG (the one that's malfunctioning) there was an error entry. Regarding the ...019MQ, I haven't tried it yet.

That also appears in my system, but with the ...019CR STG (the one that's malfunctioning) there was an error entry. With the ...019MQ, I haven't tried it yet.

I think it's probably the D4 emission standard that's the problem for you...

What does it actually look like when the AGR valve plug falls out?

Best regards, WarLord

WarLord wrote:

So, what exactly happens if the AGR valve connector comes loose?

This is the simplest exercise for STG. The solenoid is recognized as having a high impedance, and therefore the whole thing fails even more. Even my old, trusty 1-bedroom apartment could handle it.

AGR completely paralyzed, almost impossible.
With simultaneous adaptation of Channel 3 to Maximum, it could work... have you already tried it?

Therefore, I wrote 'almost'. In one case, it worked, in the other it didn't. But thank you for the tip!

Julian wrote:

AGR is practically impossible. ulf wrote: Julian wrote: With simultaneous adaptation of Channel 3 to Maximum, it could work... have you already tried it? Therefore, I wrote "almost". In one case, it worked, in the other it didn't. But thank you for the tip!

Hm . . . Did the adaptation not work, or is the "check engine" light still on?

This is the simplest exercise for STG. The solenoid is recognized as having a high impedance, and therefore the whole thing fails even more. Even my old, trusty 1-bedroom apartment

Honestly, I don't really care. It's just an error in the memory. What I'm more interested in is whether the AGR valve then remains completely closed or opens up just a little. But it's all purely theoretical.

Best regards, WarLord