Conditions for Running the DTC

WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. 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 is running greater than 400 RPM for greater than 7 seconds.
The system voltage is between 8-18 volts for greater than 0.5 second.
No TFP manual valve position switch changes for greater than 6 seconds.
No 4WD low switch change within 2 seconds.
No AT OSS increase greater than 250 RPM within 2 seconds.