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.
P182E
The internal mode switch does not indicate a valid Park, Reverse, Neutral or Drive range gear position.
P1915
The internal mode switch Park/Neutral circuit does indicate Park or Neutral during engine start.