Ford GT Radiator Pressure Issue

That sounds frustrating. I had similar symptoms with my old BMW 5 series, although it was related to the transmission oil cooler lines. The car would throw all sorts of transmission errors and go into limp mode. Have you checked the connections to the radiator and oil cooler thoroughly? Is the cooling fan working correctly?

Thanks for the quick reply! When you say 'connections,' are you referring specifically to the electrical connections to the sensors and the cooler itself, or also the physical connections, like the hoses? And regarding the cooling fan, is there a reliable way to test if it is working properly other than just observing whether it turns on?

Yes, both electrical and physical connections. A loose or corroded connector can cause all sorts of weird issues. As for the fan, you can try forcing it on via the diagnostic menu (if your car has one) or by unplugging the temperature sensor – that usually kicks the fan into high gear as a failsafe. Ultimately, you might want to just get a pressure gauge attached and get it properly diagnosed at a workshop. This might be a bit more complex than just a visual inspection.

I appreciate the clarification and suggestions. Based on your experience and the potential complexity, I'll schedule an appointment with a trusted mechanic. I'll have them thoroughly inspect the connections, cooling fan, and, as you suggested, use a pressure gauge to properly diagnose the issue. For anyone experiencing a similar issue, it turned out to be a faulty connector on the radiator pressure sensor. Cost me 95€ to repair.