LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2009 >> Focus L4-2.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Oxygen Sensor >> Description and Operation >> Electronic Engine Controls
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Electronic Engine Controls




Electronic Engine Controls

The HO2S:

- has the ability to create a voltage signal dependent on exhaust oxygen content.
- provides feedback information to the PCM used to calculate fuel delivery.


The CMS:

- has the ability to create a voltage signal dependent on exhaust oxygen content.
- provides feedback information to the PCM used to calculate catalyst efficiency.