Conditions for Setting the DTC: P1915

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The manual shift shaft IMS switch assembly does not indicate Park or Neutral during the following sequence:

The engine speed is less than 50 RPM for more than 0.15 seconds.
The engine speed is 50-480 RPM for more than 0.07 seconds.
The engine speed is greater than 525 RPM for more than 3.25 seconds.
The transmission input shaft speed is 200 RPM or greater.