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Home >> GMC >> 2021 >> Acadia AT4 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 9T50 (M3H), 9T60 (M3G) Or 9T65 (M3W) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P18A2 or P18A4 >> Conditions for Setting the DTC

Conditions for Setting the DTC

P18A2 

The control module detects a short to ground or The control module detects an open circuit. - For greater than 1 s

P18A4 

The control module detects a short to voltage. - For greater than 1 s