Conditions For Setting DTC P1875 (Condition No. 1)

WARNING: This page does not describe the selected car, but rather 36 other vehicles, including the 2002 Pontiac Firebird, 2002 Oldsmobile Bravada, 2002 GMC Yukon XL, 2002 GMC Yukon, and 2002 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: DTC will set if one of the following groups of conditions occur.

4WD low switch is in 4WD low.
Transfer case is not in 4WD low.
TCC slip speed is between -3000 RPM and -50 RPM.
Transfer case ratio is .8-1.2 (transfer case ratio is engine speed divided by transfer case output speed).
All conditions are met for 5 seconds.