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Home › Chevrolet › 2004 › Optra Base, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls - 1.4L DOHC - DTC P0107 To DTC P0335 › DTC P0138 › Conditions for Setting the DTC › Closed Loop Test

Closed Loop Test

The ECM detects that the HO2S 2 voltage is more than 952 mV.
The condition exists for more than 4 minutes.