ive purchased a rebuildable 2004 tl and have changed the throttle body new ,new speed sensors and even changed the vsa module but I keep getting the dam vsa signal time and time again thought it was a electrical problem and added a voltage stabilizer and new grounding kit on the car but I keep getting erratic idle and the vsa signal keeps resurfacing what to do do I need to change the tranny speed sensor too need help..

 

did you try pressing the VSA button?