Peugeot 5008 Generator Fault

Sounds like a dodgy alternator. Have you checked the voltage across the battery terminals when the engine's running? Should be around 14V. A significant drop could confirm your suspicion.

Good shout, I'll check that. If the voltage is low, does that definitively point to the generator, or could there be other culprits?

Low voltage strongly suggests the generator is failing. Could be a bad voltage regulator or worn brushes inside. While a bad battery could cause issues, the flickering lights and error code point towards the generator. Best to get it properly diagnosed at a workshop to be sure, though.

Thanks for the advice! Confirmed it was the generator. Replaced it and everything is running smoothly again. Repair cost was 960€.