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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 62 (Automatic Transmission - 8L45 (M5N) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P27A7-P27AE >> Circuit/System Description

Circuit/System Description

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The following components have a unique current versus oil pressure characteristic that is used to properly upshift or downshift the transmission: Transmission Control Solenoid Valve 1, 2, 3, 4, 5, 6, 7

The data for each solenoid valve is programmed into the control module K71.

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