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Home >> GMC >> 2021 >> Acadia AT4 >> Repair and Diagnosis >> External Pages >> Different car >> Section 413 (Automatic Transmission - 9T60 (M3G) Or 9T65 (M3W) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P187E, P18AA-P18AE, P27EC, or P27F0 >> DTC Descriptor

DTC Descriptor

WARNING: This page is about a different car, the 2023 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
DTC P187E

Transmission Park Valve Stuck Off

DTC P18AA

Transmission Range Control Valve 1 Position Switch Circuit Stuck On

DTC P18AB

Transmission Range Control Valve 1 Position Switch Circuit Stuck Off

DTC P18AC

Transmission Range Control Valve 2 Position Switch Circuit Stuck On

DTC P18AD

Transmission Range Control Valve 2 Position Switch Circuit Stuck Off

DTC P18AE

Transmission Range Control Enable Valve Stuck Off

DTC P27EC

Transmission Range Control Valve 1 Position Switch Performance

DTC P27F0

Transmission Range Control Valve 2 Position Switch Performance

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