Seat Arona Automatic Transmission Problem

Sounds like a faulty radiator coolant pressure sensor or its wiring harness. The transmission control unit relies on various sensor inputs, including coolant temperature and pressure, to optimize shift patterns. A bad sensor can definitely throw things off and trigger limp mode. Have you checked the wiring and connector for any obvious damage or corrosion? Also, is the radiator coolant level normal, and are you seeing any signs of a coolant leak or car overheating?

Thanks for the quick reply! I did a quick visual inspection of the wiring near the radiator, but honestly, I'm not entirely sure what I'm looking for beyond obvious breaks. Where exactly is the pressure sensor located, and is there a way to test it with a multimeter?

Okay, the sensor is usually mounted on or near the radiator itself, often on one of the coolant lines. As for testing, while you could technically use a multimeter to check for voltage and resistance, it's tricky without knowing the specific values for your Arona. Given the symptoms and the error code, and your apparent frustration, I'd suggest taking it to a workshop. It does sound like the cable or plug, so hopefully, it won't be too expensive.

Just letting you know: it was the cable/plug connection to the radiator coolant pressure sensor. 95€ later and the Arona is shifting smoothly again. Thanks for the help!