Conditions for Setting the DTC
P0815
TCM detects an upshift request for 1 s in Park or Neutral and detects an upshift request for 10 min in any forward range.
P0816
TCM detects a downshift request for 1 s in Park or Neutral and detects a downshift request for 10 min in any forward range.
P0826
TCM detects an invalid voltage on the Tap up/Tap down signal circuit for 1 min.