Corsa Overheating Bypass Valve

A bypass valve error on a Corsa combined with overheating could point to several things. It might not be the valve itself, but a consequence of another issue, especially with that mileage. Have you checked for any coolant leaks or issues with the vacuum system? Overheating and valve errors are often related to those.

Coolant leaks, eh? Where exactly should I be looking? And what's the deal with the vacuum system? How does that connect to the engine getting too hot?

Coolant leaks can be anywhere – check the radiator, hoses, water pump, and even around the engine block for any signs of weeping or drips. The vacuum system affects engine performance and fuel efficiency. A leak there can cause the engine to work harder, potentially leading to overheating and triggering that valve error as a secondary effect. I would recommend having a workshop take a look.

Thanks for the tip! Turns out it was a vacuum hose leak causing the whole mess. Got it fixed, and everything's running smooth now, and it cost me nothing!