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Home >> GMC >> 2017 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 197 (Automatic Transmission - 8L45 (M5N M5T) Or 8L90 (M5U) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P1840, P1841, P18B9, P18BE, or P18C3: Internal Mode Switch S >> DTC Descriptors

DTC Descriptors

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
DTC P1840

Internal Mode Switch S Circuit Low Voltage

DTC P1841

Internal Mode Switch S Circuit High Voltage

DTC P18B9

Internal Mode Switch S Circuit Shorted

DTC P18BE

Internal Mode Switch S Circuit Stuck Off - Invalid Voltage Range

DTC P18C3

Internal Mode Switch S Circuit Stuck On - Invalid Voltage Range

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