Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
P0815 Condition 1
Up and Down Shift Switch = Up or Upshift - For greater than 1 s
Condition 2
Up and Down Shift Switch = Up or Upshift - For greater than 2 min
P0816 Condition 1
Up and Down Shift Switch = Down or Downshift - For greater than 1 s
Condition 2
Up and Down Shift Switch = Down or Downshift - For greater than 2 min
P0826
Up and Down Shift Switch = Invalid - For greater than 1 min