Frustrationg ABS/VSCTRC problem

[bjothe]

Hello!

A few months ago, my speedometer suddenly dropped while driving. ABS/TRC/VSC light came on for a minute, then returned to normal.

This problem has been more and more frequent, and now the ABS/TRC/VSC  are constantly showing. The speedometer drops after driving for about 30 minutes, like its affected by the cars temperature or something, and comes back when the car has cooled off.

 

I took the car to my Toyota shop for diagnostic, and they never seen this problem before. I got code C1208, C1228 and C1241, which they say all has something to do with connection, open or short somewhere.

I checked the grouning points but they seem ok.

 

C1208: Steering position sensor output signal

C1228: Open or short in hydraulic brake solenoid circuit (SRT)

C1241: Low Battery positive voltage or abnormally high Battery positive voltage

 

Has someone in here the slightest idea where to start looking?

 

Thankful for any advice