S90 Control Unit Communication Error

I am experiencing a control unit communication error in my 2018 Volvo S90 gasoline engine vehicle (207789 km). Symptoms include engine overheating, check engine light activation, and coolant leakage due to excessive system pressure. Diagnostics point towards a defective cable or plug connection. Has anyone encountered similar issues?

4 comment(s)

I had a similar issue with my S90, though I am unsure about the year of manufacture. The symptoms you describe sound very familiar. Did you check the CAN bus connections? It could be a data link problem.

Could you elaborate on which specific CAN bus connections you inspected on your S90?

I did not perform the inspection myself; I took it to a workshop. The mechanic identified it as a communication fault related to a loose connection on one of the control modules. I would suggest seeking professional diagnostics; it may save you time.

Thank you for the advice. The issue was indeed a defective connector. Repair cost was 95€. Appreciated.

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