My opinion is that since you have the same error as mine, and no ABS light (which IIRC should also be on if its the DSC/ABS module) then its one of the sensors other than the wheel speed sensors (obviously since you don't get the ABS light).

Since I no longer have the X or the GT1 I'm limited in what I could contribute further.

I forgot how many other sensors there are. Maybe its only the yaw sensor that's left. In which case, there's your answer.

Did you happen to have a CANbus error too? When you went through the test plan, did you get the same screen results in the GT1 as mine?



Regardless, my bet is that same yaw sensor.