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Home › Chevrolet › 2006 › Optra5 LS, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls - 1.6L (L91) › Diagnostic Information and Procedures › DTC P0132 or P0138 › Circuit/System Verification

Circuit/System Verification

Engine running, observe the HO2S voltage parameter. The reading should fluctuate above and below the range of 350-550 mV.