I have a new 2015 Subaru Forester and I noticed the following problem: When driving at a constant low speed, in the 20-30 MPH range, the car bucks/hesitates slightly off and on, while driving. At first I thought the engine was missing, but I noticed the RPM was at about 1000 RPM, very low. And a missing engine would cause a “check engine” warning.
So I think this is a combination of the CVT and the engine lugging. The CVT should move down a notch to a lower “gear” but it doesn’t, so the engine is forced to operate at a problem speed. A normal transmission would downshift, I would think.
Can anyone else with a similar model verify this? Can I do anything to solve this, other than manually shift to the low range?
+1 to the preceding comments.
And, I will add that with automatic transmissions nowadays, it is not unusual for car manufacturers to periodically revise the programming, and it is just possible that the dealership may have a download that they can apply to your TCM.
+2 about taking it to the dealer. I have a 2014 Subaru Legacy with the CVT, but I understand the 2015 is a new generation of CVT that is supposed to be “better”. Like all new generations, there are usually bugs to work out.
I agree with the suggestion to take it to get checked out AND to test drive another of the same for comparison.
Let us know how you make out. If it turns out to be a characteristic of this powertrain, you’ll be contributing to our knowledge base so we can better help others.
This is the old thread, anyway I have to ask: I have the same exactly problem with my Forester 2016, as you describe. Have you figure out what was the problem?