Hi Sorry to hear of your warped disk problem. The warping is caused by over heating of the disk. Do you brake at high speeds a lot? Live on a large hill? Have you had the calipers overhauled to check the slide pins are not corroded? When the car goes in to limp mode it should set a fault code, i would go and get the fault code read from the memory and see whats causing that, maybe ABS due to the faulty calipers? Keep us updated