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 Performance
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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 Running the DTC
Conditions for Running the DTC
The ignition is ON.
The ignition voltage is more than 5.23 volts.
DTC P0641 is not set.
DTC P2123 runs continuously when the above conditions are met.