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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Automatic Transmission - 5ET50 (MKE)) >> Diagnostic Information and Procedures >> DTC P27A7: Transmission Control Solenoid Valve 1 Calibration Incorrect >> Circuit/System Description

Circuit/System Description

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The transmission control solenoids in this transmission require unique electrical current vs. oil pressure performance matching data values in order to function at maximum performance and efficiency. This data is programmed and stored in the Hybrid/EV Powertrain Control Module 1. When a transmission assembly, transmission line pressure control solenoid or Hybrid/EV Powertrain Control Module 1 is replaced, the Hybrid/EV Powertrain Control Module 1 must be programmed with the new or existing solenoid performance data.

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