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Home >> Ford >> 2011 >> Fusion S, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Description And Operation (Except Diesel & Hybrid) >> Powertrain Control Software >> Deceleration Fuel Shut-Off (DFSO)
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Deceleration Fuel Shut-Off (DFSO)

During a DFSO event the PCM disables the fuel injectors. A DFSO event occurs during closed-throttle, deceleration; similar to exiting a freeway. This strategy improves fuel economy, allows for increased rear heated oxygen sensor (HO2S) concern detection, and allows for misfire profile correction learning.

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