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Chevrolet
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2008
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Optra LS, Automatic
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls And Fuel - 1.6L
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Diagnostic Information and Procedures
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DTC P0135 or P0141
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Component Testing
Component Testing
Ignition OFF, disconnect the harness connector at the heated oxygen sensor (HO2S).
Test for 3-35 ohms of resistance between terminals 2 and 3.
If not within the specified range, replace the HO2S.