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Home >> Pontiac >> 1999 >> Sunfire L4-2.2L VIN 4 >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data, Normal Values and Definitions >> Scan Tool Data Definitions - Powertrain Systems >> Engine Scan Tool Data Definitions >> Air Fuel Ratio

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.
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