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Chevrolet
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2007
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TrailBlazer 4.2 S, RWD
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System & Fuel System - 4.2L - DTC P2119 To DTC P2A01
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DTC P2123
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Conditions for Setting the DTC
Conditions for Setting the DTC
The PCM detects that the APP sensor 1 voltage is more than 4.87 volts for more than 0.4 second.