Conditions for Setting the DTC: P1825: Notes

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Any one or more of the following conditions:

The IMS signal circuit A, B, or P are Low in Park for greater than 1 second.
The IMS signal circuit A is Low in D6 for 8 seconds.
The IMS signal circuit C is High in D6 for 8 seconds.
The TCM detects an invalid range from the IMS for 3.25 seconds.
The IMS signal circuit C is high in D6 for greater than 8 seconds and the engine torque is greater than 20 N.m (15 lb ft).
Park/Neutral Switch equals P/N and the IMS state is not Park or Neutral, or the Park/Neutral switch is not Park or Neutral and the IMS state equals Park or Neutral for 4 seconds.