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Seat Tarraco Overheating and Coolant Loss

My 2020 Seat Tarraco with a gasoline engine is giving me headaches. It has 168931 km on the clock. The engine overheats, the check engine light is on, and I found coolant under the car. Seems like excessive pressure in the cooling system. I suspect a control unit communication error. Could be a defective cable or plug connection.

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I have a Tarraco myself and experienced something similar. Engine overheating, check engine light, and coolant loss. It turned out to be related to a control unit issue. Did you check the CAN bus system for any diagnostic trouble codes? A faulty data link could cause communication errors between the control units, leading to the symptoms you described.

CAN bus? Data link? I'm not sure what to check exactly. Could you explain that a bit more simply?

Certainly. If the CAN bus, the car's internal communication network, has a fault in its data link, it can disrupt communication between the control units. This might trigger the check engine light and cause the engine to overheat. However, I recommend a workshop visit for a proper car diagnostics. They can pinpoint the exact source of the error. In my case, the workshop confirmed the control unit error, and the mechanics fixed it quickly.

Thanks for the information. Turns out it was a defective plug connection as suspected. 95€ later and it's fixed.

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