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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 >> Pre HO2S
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Pre HO2S

NOT READY/READY:
The scan tool will display Not Ready until the VCM has commanded Closed Loop. The HO2S is then considered Ready for operation.
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