NBox generator failure

I understand your frustration. While I don't own a Honda, I had remarkably similar symptoms with my 2018 Volvo V60. Reduced engine power, dashboard warnings, and difficulty starting all pointed to a charging system issue. Have you checked the voltage across your battery terminals while the engine is running? A healthy charging system should maintain a voltage of around 13.5 to 14.5 volts. A significant drop below that range may indicate a faulty alternator.

Okay, that's helpful to know it's not just a 'Honda' thing. I don't have a voltmeter handy, but if it's the generator (alternator, whatever you want to call it), wouldn't the car just completely die after a while? I'm still able to drive it, though I don't want to risk getting stranded. And does the alternator impacts the engine power? I thought it was just about charging the battery.

To address your questions: While a completely failed generator will eventually lead to a dead battery and a non-operational vehicle, an intermittently failing generator can still provide some charge, allowing you to drive for a limited time. However, this is not advisable as you risk complete failure at an inopportune moment, as you correctly pointed out. Regarding engine power, modern vehicles rely heavily on electrical systems. Insufficient voltage can affect various sensors and actuators, leading to reduced engine performance. In my professional opinion, based on the symptoms you've described, a defective generator is a highly probable cause. I recommend you visit a qualified workshop.

Thanks a lot! I took your advice and brought it to my local mechanic. Turns out the generator was indeed toast, just like you said. The final bill came out to 960€ for a new generator and labor. Ouch! Appreciate you pointing me in the right direction. At least now I know what was going on.