Code P089, Long Shift And Maximum Adapt: Notes
WARNING: This page is about a different car, the 1995 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
Transaxle pressure is modified by an adaptive modifier used to control gear shift execution time. This test checks the shift extension and time it takes to accomplish it. If it takes longer than .55 second and adaptive modifier cannot shorten this time, counter will increment. When counter reaches 5, Code P089 will set.