Conditions For Running DTC

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

No TFP manual valve position switch DTC P1810.
The engine speed is greater than 450 RPM.
The engine is not in fuel cutoff.
The time since the last gear range change is greater than 6 seconds.
The transmission output speed rise does not exceed 600 RPM within 2 seconds.