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Home >> Chevrolet >> 2004 >> Optra Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 1.6L (L91) - DTC P0107 To DTC P0335 >> DTC P0137 >> Conditions for Setting the DTC >> Closed Loop Test

Closed Loop Test

The ECM detects that the HO2S voltage is less than 70 mV.
The condition exists for more than 40 seconds.

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