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Home >> Pontiac >> 2009 >> G8 GXP, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 6.0L, 6.2L - Introduction >> Description and Operation >> Fuel System Description >> Modes of Operation

Modes of Operation

The engine control module (ECM) looks at voltages from several sensors to determine how much fuel to give the engine. The fuel is delivered under one of several conditions called modes. The ECM controls all modes.