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Home >> Cadillac >> 2000 >> Seville STS V8-4.6L VIN 9 >> 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
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Air Fuel Ratio

The scan tool displays the PCM commanded air to fuel. Air fuel ratio should normally be around 14.2:1 - 14.7:1. A lower air fuel ratio indicates a richer air to fuel mixture. A higher air fuel ratio indicates a leaner commanded air to fuel mixture.
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