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Chevrolet
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2002
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Impala LS
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Repair and Diagnosis
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Engine Performance
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Testing & Diagnosis
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Engine Control System Self-Diagnostics - 3.8L
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Diagnostic Tests
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DTC P0140: Ho2S Circuit Insufficient Activity - Sensor 2 (Regal)
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Conditions For Setting DTC
Conditions For Setting DTC
DTC sets when HO2S 1 signal voltage remains between 425-475 millivolts for up to 90 seconds.