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Pontiac
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2005
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Grand Prix GXP
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - 5.3L - DTC P0016 To P0141
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DTC P0121
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Conditions for Setting the DTC
Conditions for Setting the DTC
The TP sensor 1 disagrees more than 9 percent from TP sensor 2.
The TP sensor 1 disagrees more than 9 percent from the predicted value.
The above conditions are met for less than 1 second.