Focus L4-2.0L (2009)
![background image](/ford/focus/l4-2.0l/Page-913001.png)
Engine Control Module: Description and Operation
Electronic Engine Controls
The PCM:
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accepts input from various engine sensors to compute the fuel flow rate and spark timing necessary to maintain a prescribed air/fuel ratio
throughout the entire engine operating range.
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outputs a command to the fuel injectors to meter the appropriate quantity of fuel.