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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 P0877 or P0878 >> Conditions for Setting the DTC >> P0878

Conditions for Setting the DTC: P0878

The TCM detects that the TFP switch 4 signal voltage is high, 12 volts when the 1-2-3-4 clutch is commanded OFF.

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