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Alero L4-144 2.4L DOHC VIN T SFI
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Powertrain Management
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Testing and Inspection
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Scan Tool Testing and Procedures
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Scan Tool Data Definitions - Powertrain Systems
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Engine Scan Tool Data Definitions
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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
(02S 1) inputs. The
PCM
uses the fuel trims to adjust fueling in order to maintain an air fuel ratio of 14:7:1.