Xoutpost.com - Extreme cold = low oil pressure ?

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So how does he explain the stalling? That's certainly not all right. Did he scan for codes?

he told me it might be maybe a electronic/ECU bug that make the car shut down, didnt ask about the code... i guess i gotta have to find out myself which is like looking for a needle in the haystack

You need a code reader.

Any code reader recommandation ?

A must have 'tool' for a DIYer is a code reader. That is the first thing to do when there is a problem. Though codes are often directional rather than definitive they will certainly narrow down troubleshooting to the core issue. I use the Foxwell 510 elite. 530 is the newer version and you can buy multiple software to cover other brands. The features are the same.
https://www.foxwellstore.com/service...0-scanner.html

Spark plugs don't lie. I would pull a couple of plugs and read them.
https://www.youtube.com/watch?v=lVCs5gWLUyI