My 2014 Malibu , is throwing code P1915 and P0700… The car is not reading the gears as I’m shifting through , I am still able to drive when this happens however once the car gets going and having to stop it doesn’t want to get back up to speed , after accelerating (maybe 15-30secs) it will finally get back to speed then will drive like normal . And other times when the car is reading the gears it drives perfectly . But sometimes if I turn on the car and it is reading the gears once I begin driving my dash will begin switching from D to M even though the gear itself is not being physically changed by me . Can anyone point me in the right direction or advice how to fix problem