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GMC Truck
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1999
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S15/T15 Sonoma P/U 2WD V6-4.3L VIN X
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Testing and Inspection
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Scan Tool Testing and Procedures
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Scan Tool Data, Normal Values and Definitions
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Scan Tool Data Definitions - Powertrain Systems
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Air Fuel Ratio
Air Fuel Ratio
Range -
(0.0:1-25.5:1)
The scan tool indicates the
VCM
calculated air to fuel ratio. The typical air to fuel ratio is 14.7:1.