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Home >> Chevrolet >> 2006 >> Optra LS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 1.8L (L79) - DTC P0016 To DTC P0420 >> DTC P0137 or P0138 >> DTC Descriptors

DTC Descriptors

DTC P0137: HO2S Circuit Low Voltage Sensor 2
DTC P0138: HO2S Circuit High Voltage Sensor 2

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