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Home >> Cadillac >> 2003 >> CTS Automatic >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Fuel Systems >> Fuel Control >> Deceleration Mode

Deceleration Mode

ECM monitors changes in TP and MAF sensor signals to determine when vehicle is being decelerated. The ECM will then decrease injector pulse width or even shut-off injectors for short periods to reduce exhaust emissions.