Hi have a 06 st150 ( re map ebiach springs induction straight through exhaust magnicore leads etc) my handbrake light n handbrake light came on got it diagnostic tested the guy said abs on rear changed that went back still happend. Changed my module my speedo came back and solved the problem. There £700 new without fitting! I got a 2nd hand one and fitted myself didn't take long a few bolts on the bracket and torx on the back and take the battery out. Good luck