konstantinhimmel1

Seat Arona Diesel Electrical Problems

I'm having a strange electrical problem with my 2018 Seat Arona diesel. I'm getting many fault codes related to overvoltage. Several systems are failing, and the battery seems weak when starting. Could a deeply discharged or bad battery really cause all of this? It seems like a power surge, or maybe a circuit protection issue?

4 comment(s)

Overvoltage, huh? That sounds bad. With so many systems acting up, a weak battery could easily be the source, creating voltage dips and spikes. Have you looked at the alternator output? Is it charging properly, or is it potentially overcharging and damaging things? What about the ground connections? A poor ground can cause strange electrical problems. Just a few thoughts...

Thanks for the input! How can I check the alternator output myself? I don't have specialized equipment. Can I do it with only a multimeter?

Yes, a multimeter will work, but be careful! You're dealing with electricity. Given the symptoms, your lack of tools, and the possibility of alternator failure, I suggest taking it to a shop. Overvoltage can seriously harm sensitive electronics. It's better to be safe, don't you think?

The battery was the problem, just as we thought. It was heavily discharged and messing everything up. A replacement cost 290€, and now everything is working perfectly. Thanks for the assistance!

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