Conditions for Setting the DTC
WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
P0815 - Condition 1
TCM detects an upshift request for 1 s with the shift lever in Park or Neutral.
P0815 - Condition 2
TCM detects an upshift request for 10 min with the shift lever in a forward range.
P0816 - Condition 1
TCM detects a downshift request for 1 s with the shift lever in Park or Neutral.
P0816 - Condition 2
TCM detects a downshift request for 10 min with the shift lever in a forward range.
P0826
TCM detects an invalid voltage on the Tap Up/Down signal circuit for 1 min.