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Home >> Oldsmobile >> 2000 >> Alero L4-144 2.4L DOHC VIN T SFI >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions - Powertrain Systems >> Engine Scan Tool Data Definitions >> Loop Status

Loop Status

RANGE OPEN/CLOSED:
A Closed Loop displayed indicates that the PCM is controlling the fuel delivery according to the oxygen sensor (O2S 1) voltage. The PCM controls the fuel delivery air-to-fuel ratio as close to 14.7:1 as possible.
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