TOYOTA YARIS 2013 XP13 1.33 CVT
Hey everyone,
I drive a 2013 Yaris 1.33 equipped with the K411 CVT, and I'm dealing with a transmission issue that has me stumped. I'm hoping someone here might have some insight.
I was experiencing some issues under load in the manual mode ( in Drive works perfectly, even when it is warm).
Because of that, I recently had the CVT belt and both pulleys completely replaced.
Here is the weird part: after the repair, the car drives perfectly (in manual mode) for the first 20 km (about 12 miles) on the road. However, once I pass that mark—presumably when the transmission gets fully up to operating temperature—the RPMs start fluctuating and varying again whenever the transmission is under load.
Has anyone experienced this specific behavior with the K411 CVT? Since the physical belt and pulleys are brand new, could this be a valve body issue, a failing solenoid, or something related to the fluid temperature?
Any advice on what to diagnose next would be greatly appreciated. Thanks!