jenniferhunter5

Mini One Diesel Overvoltage Error

I'm getting an overvoltage detected error on my 2004 Mini One diesel. There are many fault memory entries pointing to overvoltage and various systems are failing. Starting the engine is difficult because the battery seems weak. Could a heavily discharged or defective car battery really cause this high voltage issue?

4 comment(s)

I had similar symptoms in my Mini One. Overvoltage errors, systems failing, and the battery was constantly weak. Have you checked the battery condition thoroughly? A faulty battery can cause a power surge and trigger those ECU errors.

When you say 'similar', was it also triggering overvoltage errors specifically? And did replacing the car battery resolve the electrical malfunction?

Yes, overvoltage was logged as the main error. Replacing the car battery fixed it completely. The high voltage readings were false positives caused by the failing battery messing with the car ECU. If your battery is weak, I'd suggest getting it checked out. It might be worth a visit to the workshop.

Just wanted to let you know that the problem is now solved. It was indeed the car battery. Had to replace it. The total cost was 290€. Thanks again for your help.

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