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GMC
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2003
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Safari Van Cargo, AWD
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Repair and Diagnosis
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Engine Performance
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Testing & Diagnosis
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Engine Controls - Self-Diagnostics - 4.3L
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Diagnostic Tests
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DTC P0134 Or P0154: Ho2S Circuit - Insufficient Activity (Bank 1 & 2, Sensor 1)
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Conditions For Setting DTC
Conditions For Setting DTC
PCM detects that the affected HO2S voltage parameter is between 350-550 mV for 60 seconds.