Have a 2015.5 giving me fits. Bone stock. Under powertrain warranty still but dealers just scratch their heads.
It will intermittenly buck very hard just prior to the upshifts. It is like a rough rev limiter. The only way I can get it to do it repeatedly is with a load on it and it still is random. If it starts to buck, I can quickly stab the throttle, which will prolong the bucking but not long enough to diagnose. The cutting out quits as soon as it makes the upshift. The only code it sets is a Underboost code
. It seems like it is most prone to it at around 40-60% throttle and with a small load on, enough to make a difference in upshift timing.
Thought about getting a video but it is extremely hard to get it to act up. But its bad when it does!
It will intermittenly buck very hard just prior to the upshifts. It is like a rough rev limiter. The only way I can get it to do it repeatedly is with a load on it and it still is random. If it starts to buck, I can quickly stab the throttle, which will prolong the bucking but not long enough to diagnose. The cutting out quits as soon as it makes the upshift. The only code it sets is a Underboost code
. It seems like it is most prone to it at around 40-60% throttle and with a small load on, enough to make a difference in upshift timing. Thought about getting a video but it is extremely hard to get it to act up. But its bad when it does!