Conditions For Running DTC

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

No AT ISS DTCs P0716 or P0717.
No IMS DTCs P1820, P1822, P1823, or P1825.
No 1-2 shift solenoid valve electrical DTC P1843.
The engine run time is greater than 5 seconds.
The transmission is not in Park or Neutral.
The time since the gear select lever change is greater than 6 seconds.
The transmission input shaft speed has not changed by 500 RPM or greater for at least 4.8 seconds.
The transmission output shaft speed is greater than 1484 RPM and has not increased by 500 RPM or greater for at least 2 seconds.