Arkana transmission error

That sounds rough. Something similar happened to my Arkana last year. First, check the coolant level; if it's low, there might be a leak messing with the pressure readings. Also, check the cooling fan. If it's not working, the system can overheat and trigger those sensors. Did you notice any car overheating?

I checked the coolant, and it seemed fine. No car overheating either. The cooling fan seems to be working. Where did you have a leak, and how did you find it? Was the pressure gauge faulty or something else?

Mine wasn't a straightforward leak; it was a tiny crack in a hose that only leaked when the engine was hot and under pressure. It was impossible to spot at first. After messing around, I took it to a workshop. They pressure tested it and found it quickly. Considering the error codes, especially the transmission stuff, I'd get it checked professionally to be safe.

I appreciate the insight. I booked it in, and you were spot on; it was a corroded connector on the radiator pressure sensor. 95€ later, and it's running perfectly.