Corsa Overheating and Communication Error

Sounds like a proper headache! I had something similar happen with my Corsa (don't remember the year exactly). Kept getting random errors and overheating. Did your scanner give you a specific diagnostic trouble code (DTC)? It could be a dodgy connection somewhere messing with the data link. Like a loose wire in a Christmas light string, one faulty bulb and the whole thing goes haywire!

Yeah, it's throwing a U0100 code, lost communication with ECM/PCM. I suspected a wiring issue, but can't pinpoint it. Could it also be some kind of software glitch? Did yours throw the same code, and was it a connection problem in the end?

U0100 rings a bell for sure. Honestly, I messed about trying to find it myself for ages, checking fuses and praying to the car gods. In the end, I took it to a workshop, and they found a corroded connector on one of the control units. Cleaned it up, and problem solved. Saved me loads of time and grief. Sometimes, it's best to admit defeat!

Thanks! I appreciate the input. I'll take it to a local garage, I think. They've quoted me 95€ for checking and cleaning the faulty cable or plug connection. Sounds like a fair price to get rid of the problem!