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Home >> Chevrolet >> 2000 >> Express 1/2 Ton Van V6-4.3L VIN W >> 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 >> Fuel Trim Enable
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Fuel Trim Enable

YES/NO:
This parameter indicates when the VCM is using fuel trim values to adjust fuel delivery to the engine. Fuel trim will be disabled when the vehicle is not in Closed Loop, malfunction codes related to fuel trim are set, large amounts of purge vapor are ingested by the engine, or additional diagnostics that temporarily affect fuel trim operation are active.
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