CBAB: Interpreting VTG Error Codes

Hello,

I have a CBAB engine here (with DGS), and it's running perfectly fine, showing full power and normal fuel consumption.
After fixing the errors and a test drive of about 10 kilometers, none of them reappeared.
The control system for the VTG is working perfectly (MWB 034: comparison of actual vs. target values).

But how could these errors occur on a 2600 km trip, leading to the persistent illumination of the MIL (Malfunction Indicator Lamp) at the end?

Could this be a hot-linking issue?
Or is it simply that the Hall sensor on the VTG is aging and didn't like the warm weather in Nice?
Or, to put it bluntly, a loose connection or broken wire leading to the Hall sensor?


Recently, I encountered a faulty VTG membrane that exhibited completely different behavior.

Code:

Adresse 01: Motorelektronik (CBA)       Labeldatei: RKS\03L-906-022-CBA.clb    Teilenummer SW: 03L 906 022 QD    HW: 03L 907 309    Bauteil: R4 2,0L EDC G000AG  5583     Revision: 13H02---    Seriennummer: VWZCZ000000000    Codierung: 0000078    Betriebsnr.: WSC 84224 164 739974    VCID: 77F67B9E06B634A6AAD-8022 3 Fehlercodes gefunden: 009572 - Positionsgeber für Ladedrucksteller                P2564 - 000 - Signal zu klein - Sporadisch              Freeze Frame:                     Fehlerstatus: 00100000                     Fehlerpriorität: 2                     Fehlerhäufigkeit: 73                     Verlernzähler: 255                     Kilometerstand: 143789 km                     Zeitangabe: 0                     Datum: 2057.14.08                     Zeit: 15:00:16              Freeze Frame:                     Drehzahl: 782 /min                     Geschwindigkeit: 0.0 km/h                     Spannung: 14.14 V                     Lambda: 51.3 %                     Lambda: -0.8 %                     Binärwert: 00000000                     Spannung: 0.076 V 009571 - Positionsgeber für Ladedrucksteller                P2563 - 000 - unplausibles Signal - Sporadisch              Freeze Frame:                     Fehlerstatus: 00100000                     Fehlerpriorität: 2                     Fehlerhäufigkeit: 15                     Verlernzähler: 255                     Kilometerstand: 144613 km                     Zeitangabe: 0                     Datum: 2057.14.11                     Zeit: 14:14:52              Freeze Frame:                     Drehzahl: 0 /min                     Geschwindigkeit: 0.0 km/h                     Spannung: 12.46 V                     Lambda: 100.2 %                     Lambda: 0.0 %                     Binärwert: 00000000                     Spannung: 0.228 V 009571 - Positionsgeber für Ladedrucksteller                P2563 - 000 - unplausibles Signal - Sporadisch              Freeze Frame:                     Fehlerstatus: 00100000                     Fehlerpriorität: 2                     Fehlerhäufigkeit: 3                     Verlernzähler: 255                     Kilometerstand: 144770 km                     Zeitangabe: 0                     Datum: 2057.14.11                     Zeit: 15:27:11              Freeze Frame:                     Drehzahl: 897 /min                     Geschwindigkeit: 3.0 km/h                     Spannung: 13.91 V                     Lambda: 73.4 %                     Lambda: 0.0 %                     Binärwert: 00011110                     Spannung: 1.596 V Readiness: 0 1 0 0 0

I'm leaning more towards a faulty sensor or cable/connector issues (possibly due to rodent damage). A "signal too low" reading is probably less likely to be caused by a stuck variable torque governor.

Best regards, Rainer.

According to the year displayed in the freeze frames, the car seems to think it's about 50(?) years old. Wouldn't it be time to help it along with its long-overdue demise by adding a few nonsensical error entries?
*duck and cover*

ulf wrote:

According to the year displayed in the freeze frames, the car probably believes it is about 50(?) years old... wouldn't it be time to help it along with its long-overdue own scrapping by adding a few nonsensical error entries? *duck and run*

Yes, I noticed that too afterwards, and I actually intended to address it in version 14... but now the errors have already been removed and won't reappear.

But the car is not far away .

Rainer wrote:

I'm leaning more towards a faulty sensor or cable/connector issues (possibly due to damage from rodents).

That's probably the most likely explanation, especially since the owner mentioned that it had supposedly been "repaired" on the wiring harness before.

"A loose crimp connection... and suddenly there's a Christmas tree in the server room," might be appropriate.

I'd like to have the doctor's report from the previous incident .

Okay, please provide the German text you would like me to translate into English. I will only provide the translation.

It's noticeable that the speed is in the idle range.
Hot-clamping usually occurs at higher speeds.

I also think it's the power supply line.

Based on the described situation, it usually occurred during stop-and-go traffic jams.

But yes, even there, the turbocharger is definitely not as hot as it would be under full throttle.
He says that he didn't drive at full speed towards the traffic jam.

I'll check the cables.

"Stop-and-go" might more accurately describe the maximum amount of shaking and thus movement that the cables experience.

Thank you.
Okay, please provide the German text you would like me to translate into English. I will only provide the translation.

Yesterday, I had the tractor here again.

All the movement observed in the VTG cable harness did not result in any change in measured values.
He was stuck at 0.684 volts.

Only when the plug was pushed firmly backwards, causing the VTG container to receive a significant amount of force, did it switch to 0.760 volts.
He also did that when the entire VTG container was pushed firmly backward.

Since no more errors have occurred in the past few days, I'll just leave it as is for now.

Greetings.
Okay, please provide the German text you would like me to translate into English. I will only provide the translation.