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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 360 (Automatic Transmission - 10L60 (MQA) Or 10L80 (MHU) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P18A1, P18AA, P18AB, or P27EC >> DTC Descriptor

DTC Descriptor

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
DTC P18A1

Electronic Transmission Range Select Valve Performance - Stuck On

DTC P18AA

Transmission Range Control Valve Position Sensor Circuit Stuck On

DTC P18AB

Transmission Range Control Valve Position Sensor Circuit Stuck Off

DTC P27EC

Transmission Range Control Valve Position Sensor Circuit Performance

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