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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6L50/6L80/6L90 - DTC P0218 To DTC P0971 >> DTC P0851 or P0852 >> Conditions for Setting the DTC >> P0852

Conditions for Setting the DTC: P0852

The ECM detects the Park/Neutral switch signal equals 12 volts (High) when the IMS reports a Park/Neutral range for 3 seconds.