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Scan Tool Data Definitions - Powertrain Systems
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AIR Fuel Ratio
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AIR Fuel Ratio
Range 0:1-25.5:1
The air fuel ratio indicates the air to fuel ratio based on the
Oxygen Sensor
(O2S 1)
inputs. The
PCM
uses the fuel trims to adjust fueling in order to attempt to maintain an air fuel ratio of 14.7:1.