Peugeot 3008 Terminal 30 Interrupted

Sounds familiar. I had a similar issue with my 3008, though I can't remember the year. Have you checked for any voltage drops or shorts in the wiring harness? It might also be worth looking at the starter motor connections.

Could you elaborate on the wiring harness check? Which specific areas are most prone to issues?

I had the same problem. The main power supply cable had chafed through where it passes near the engine mount. I suggest going to the workshop to have a look at the harness and do a battery test. I'm afraid it's a bit beyond my abilities to give advice from afar.

Thank you for confirming the problem and pointing me to the wiring harness. I will schedule a workshop appointment. The estimated repair cost is 290€.