Mike's Workshop Manuals
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Hummer
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2007
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H3 Standard
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Repair and Diagnosis
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Engine Controls And Fuel - 3.7L - DTC P2120 To DTC P2444
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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 seconds.