Conditions for Running the DTC

WARNING: This page is about a different car, the 2003 GMC Yukon XL, 2003 Chevrolet Suburban, and 2003 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 for greater than 7 seconds.
The system voltage is 8-18 volts.
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.