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Buick
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2002
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Regal LS
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Repair and Diagnosis
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Engine Performance
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Engine Control System Self-Diagnostics - 3.8L
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Diagnostic Tests
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DTC P0134: Ho2S Circuit Insufficient Activity - Sensor 1
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Conditions For Setting DTC
Conditions For Setting DTC
DTC sets when HO2S 1 signal voltage remains between 400-500 millivolts for more than 30 seconds.