tildaweiss1

Seat Arosa electrical issues

I am writing regarding my 2001 Seat Arosa with a gasoline engine and 180995 km. The vehicle is reporting overvoltage. Symptoms include many fault memory entries, failure of various systems, a weak battery during engine start, and general electrical malfunction. The battery is suspected to be heavily discharged or defective.

4 comment(s)

Sounds familiar. I had similar issues with my Arosa. Loads of weird errors popping up. Have you checked the alternator?

I have not checked the alternator. Would a failing alternator cause the car ECU to report overvoltage? I thought a bad alternator would cause undervoltage.

Yes, a failing alternator can definitely cause overvoltage, especially if the regulator is faulty. It can send power surges through the car electronics. Best get it checked out properly at a workshop before it fries something expensive like the ECU.

I appreciate the help. The workshop confirmed it was a heavily discharged battery causing the overvoltage and electrical malfunctions. New battery and checkup cost 290€.

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