(OP here) This is nuts. My traction control light is now back on months later. My car is also throwing a code for multiple pistons misfiring. The car is shaking, making crazy noises under the hood, jerking when shifting gears. The shop I took it to doesn’t know what is causing it; the same shop that replaced a transmission solenoid months back, which somehow got the TC light to stop coming on, until now. I’m so %#*@ tired of this.