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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 233 (Automatic Transaxle - 4T65-E - DTC P0751 To DTC P1823 - 3.5L) >> DTC P1811 (3.9L) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

The transmission pressure is modified by an adaptive modifier which controls the shift execution time. This diagnostic tests the time required to accomplish the shift. If the shift takes longer than 0.65 seconds and the adaptive modifier cannot shorten this time, then a counter increases by one.

If the TCM detects a counter value of 2 during one trip, then DTC P1811 sets. DTC P1811 is a type C DTC.

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