Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
P0815 - Condition 1
The TCM detects a stuck ON Tap Up switch for 1 s in Park or Neutral.
P0815 - Condition 2
The TCM detects a stuck ON Tap Up switch for 10 min in any forward gear.
P0816 - Condition 1
The TCM detects a stuck ON Tap Down switch for 1 s in Park or Neutral.
P0816 - Condition 2
The TCM detects a stuck ON Tap Down switch for 10 min in any forward gear.
P0826
The TCM detects an invalid voltage on the TAP up/down signal circuit for 1 min.
P1876
The TCM detects a TAP Enable Switch request 3 times when not in M (D6) range for 2 s.