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Engine Control System & Fuel System - 5.3L - DTC P0420 To DTC P3449
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DTC P3400
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Conditions for Setting the DTC
Conditions for Setting the DTC
The ECM detects that the actual measured values from the MAF sensor, MAP sensor, and TP sensor, is not within the range of the calculated values for V4 mode.
The above condition is met for more than 100 milliseconds.