Captiva Overheating and Communication Error

The symptoms you described, in conjunction with the diagnostic trouble code related to a control unit communication error, suggest a potential issue with the Controller Area Network (CAN) bus or a faulty connection. Have you inspected the data link connector and associated wiring for any signs of corrosion or damage? A defective cable or plug connection on a component connected to the CAN bus could be the culprit.

Thanks for the info! Where exactly should I be looking for the data link connector and what components should I check the cable or plug connection on?

The data link connector is typically located under the dashboard, often near the steering column. Given the overheating issue, focus on modules related to engine cooling, such as the engine control module (ECM) and any modules controlling the cooling fan. However, pinpointing the exact faulty component without specialized diagnostic tools can be challenging. Considering the potential for further damage, a qualified technician can perform a comprehensive diagnostic test.

Thanks, that’s helpful. I booked it into a workshop. Turns out it was a defective cable connection, just like you suspected. Cost me 95€ to fix. Appreciate the advice!