The problem is that those vehicles have CVT control software that is written to use high hydraulic pressure during certain CVT operation modes, which as a result may subject the drive pulley shaft to high stress. In addition, while some of the drive pulley shafts were being built, some parts may have been produced at the low end of the hardness specification. If shafts with lower hardness are repeatedly subjected to the specific high hydraulic pressure modes, it may result in the shaft breaking during operation. This isn’t a good thing, because if the drive pulley shaft breaks, the vehicle may lose acceleration or the front wheels may lock up while driving, increasing the risk of a crash.
Honda says it hasn’t received reports of any crashes or injuries related to this issue, which was discovered through the warranty claim process in the United States.
Honda says it will start mailing notifications to customers in mid-October, 2015. Additionally, owners of these vehicles can determine if their vehicles require repair now by going to www.recalls.honda.com or by calling (888) 234-2138.