Velsatis Overheating Communication Error

Whoa, overheating VelSatis isn't fun! That check engine light could be screaming about anything. A coolant spill? Yikes, pressure's definitely not where it should be. A dodgy connection sounds plausible. I'd double-check all the wiring and plugs around the control unit, maybe even clean 'em with some contact cleaner. What diagnostic trouble code are you pulling? Could be a software glitch too, but those connections are usually the culprits. Has the car been throwing any other weird codes or acting strangely?

The diagnostic trouble code indicates a generic communication failure within the engine control module. I'm going to inspect the wiring harness and connectors more thoroughly. Is there a specific data link or component known to be problematic on this model?

Right, a generic communication failure... sounds like the ECU is throwing a tantrum. Honestly, on these older VelSatises, it could be almost anything in the data link. Given the overheating and coolant issues along with the communication error, I really think you should take it to a workshop. It sounds like more than just a loose wire, and you don't want to risk cooking the engine. Messing with ECUs can be tricky.

I took it to a workshop as suggested. It was a corroded connector on the engine control unit. Cleaning and securing the connection, and replacing a faulty thermostat, fixed the overheating and communication error. Total repair cost was 95€.