GT2 pro going slow

[carrot]

I have a problem with my sp gt2 pro,runs fine for about 3 laps then the car slows considerably but keeps going just at reduced speed.Swopped speedo and the problem has gone.
Does anyone have any experience of this problem and if it's worth repairing.thanks

[RudolfXC]

It may not be compatible with your motor sensor board so thinks it has overheated. Try disabling protection for one run.