Died while driving?

[stefcio007]

Did some recent tests and it's ~13V while driving around. (logged with a VAG-COM)
When starting the car the battery level drops to 9.25V.
With the car just sitting there and keys in it's 11.63V.

Hasn't happened since and the car is running fine.

[wai]

The voltage while driving will be mainly from the alternator.

I'd still get it tested because if you have cells that have died or are about to die, it all happens very suddenly and then you do not have a choice as to what battery to get and where from.

Most battery resellers will do a load test free. On my Hiace SBV, I had trouble getting the central locking to work reliably. I took it in to Battery Allsorts here and told them it might be the battery. They did a load test and said the battery was fine (around 5 years old). Next door was an auto electrician who they suggested I see. Well, it turned out to be actuators that were loose and so the operation was not fully locking or unlocking the door. The battery place got nothing for it and the auto electrician charged me something like $40 to diagnose and fix the problem.

So, there are places out there that do the right thing. Oh, the battery lasted at least another 4 years when I traded it on my Caddy.

[AALocksmiths]

While you had your VAGCOM connected did it show any fault codes?
And does it show you live data of what the electronics are doing?

[stefcio007]

While you had your VAGCOM connected did it show any fault codes?
And does it show you live data of what the electronics are doing?

Only fault code is crankshaft position sensor.

Yes, there are sections where it shows live data, I set it up to show them while driving and log it.
I'm not sure if there is a lot of electrical load data I can read. From memory it was only "Battery Voltage" that I could view.