Ignition Off Time Signal: 7781 Code

Hello everyone,

Can someone possibly help me understand the following error message?

Code:

Adresse 01: Motorelektronik (------CZGB)       Labeldatei:. DRV\07K-907-309-V1.clb    Teilenummer SW: 8U0 907 404 C    HW: 07K 907 309 D    Bauteil: 2.5l R5/4V TF X54 0001     Revision: NIX54---       Codierung: 32250032253609033620    Betriebsnr.: WSC 00000 000 00000    ASAM Datensatz: EV_ECM25TFS0118U0907404C 001001    ROD: EV_ECM25TFS0118U0907404C.rod    VCID: 38749EFB8365EF8A25-806C 1 Fehler gefunden: 7781 - Signal für Zeitspanne Zündung aus           P150A 00 [032] - unplausibel           Sporadisch - unbestätigt - geprüft seit letzter Löschung              Umgebungsbedingungen:                     Fehlerstatus: 00000001                     Fehlerpriorität: 2                     Fehlerhäufigkeit: 1                     Kilometerstand: 20061 km                     Datum: 2019.06.14                     Zeit: 15:29:56                     Motordrehzahl: 239.00 /min                     Normierter Lastwert: 54.9 %                     Fahrzeuggeschwindigkeit: 0 km/h                     Kühlmitteltemperatur: 17 °C                     Ansauglufttemperatur: 18 °C                     Umgebungsluftdruck: 1000 mbar                     Spannung Klemme 30: 10.160 V                     Verlernzähler nach OBD: 35                     Status des Motors: COENG_CRANKING                     Status des Motors-Test_Program_Co Eng st COMPU VERB UBYTE: 2

According to the date and time, I must have started the car there, and then drove normally (without any problems). The return trip was also uneventful, and the subsequent 2-4 engine starts (covering a distance of 40 km) have also been fine.

Could something like this happen occasionally, or does it indicate a potentially larger, upcoming problem? And what exactly is it?

Hello,

I suspect it's a message on the CAN bus, specifically "Ignition off duration," that is being incorrectly transmitted by the engine control unit.
It's likely due to a low battery voltage; the voltage readings in the current environment are around 10.x V.

Therefore, and unless any modifications have been made to the engine control unit, instrument cluster, or immobilizer, it is best to wait and see.
Clear the error and see if it reappears.

Best regards, Rainer.

Okay, thank you.

"Nothing modified" is, of course, relative. It has different software installed and different spark plugs, but that's all been the case for "ages," and the engine control unit (ECU) has never complained about it.

I need to check the battery voltage. It's also possible that the starter motor drained it during startup, right?

kossmann wrote:

I need to take a look at the battery voltage. But it's also possible that it was drained by the starter motor during startup, right?

Yes, as I said, I would first continue to observe.

Best regards, Rainer.