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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Manual Transmission - TREMEC 6-Speed (Mg9 M3L)) >> Diagnostic Information and Procedures >> DTC P18C9: Gear Position Sensor >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

P18C9 

ECM detects the transmission is in neutral and gear position sensor does not indicate neutral for 3 s.