Vauxhall Adam Control Unit Communication Error

I'm getting a control unit communication error on my 2018 Vauxhall Adam (gasoline engine, 106889 km). The engine overheats, the check engine light is on, and coolant is leaking because of excessive cooling system pressure. Diagnostics suggest a defective cable or plug connection. Has anyone else seen this?

4 comment(s)

Whoa, sounds rough. I have an Adam too and had something similar happen last year. Did you happen to pull any diagnostic trouble codes (DTCs)? Mine was a weird software glitch that kept throwing a communication fault between the control module and some other sensors.

Indeed. The diagnostic tool registered a communication fault, but I suspect a hardware defect. Was your issue resolved by software recalibration alone, or was there any component replacement involved?

Honestly, I tried a bunch of stuff, but nothing really fixed it permanently. Ended up just taking it to a workshop. They seemed to think it might've been a wiring issue somewhere. Best to get it checked properly.

Understood. Thank you for the insight. Following your suggestion, a local shop identified a defective plug connection, as suspected. Repair cost was 95€. The system is now operating within normal parameters.

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