isabell_eule1
Seat Mii Electric High Voltage System Error
Summary of the thread
A high-voltage system error in a 2021 Seat Mii electric vehicle causes the engine to shut off intermittently and reduces engine power. The issue is suspected to be related to a heavily discharged or defective battery, possibly due to a faulty voltage sensor. It is advised to check for cable damage and water ingress in the high-voltage system connectors. The problem was confirmed to be a voltage sensor issue caused by cable damage, which was resolved with a repair.
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4 comment(s)
isabell_eule1 (community.author)
Thank you for the quick reply. Regarding the electrical wiring, is there a specific area of the high-voltage system I should focus on when checking for cable damage? I am not sure where the voltage sensor is located.
antonwinkler29
It's difficult to say remotely, but water ingress can cause all sorts of EV problem, especially around the high-voltage system connectors. Given the symptoms, further investigation is needed. I would advise a qualified workshop to check the electrical wiring and all connectors. It does sound like a voltage sensor issue.
isabell_eule1 (community.author)
Understood. The voltage sensor was indeed the culprit, likely due to cable damage in the high-voltage system. Repair cost came to 290€. Thank you for your input.
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SEAT
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MII
antonwinkler29
The error message and symptoms you describe do point towards a high-voltage system issue. It's like a heart murmur in a human – hard to pinpoint without proper diagnostics. Has the vehicle been exposed to extreme temperatures or moisture lately? Check for obvious cable damage in the electrical wiring.