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Home >> Buick >> 2001 >> Century Custom >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 3.1L & 3.4L >> Diagnostic Tests >> DTC P0404: EGR System Open Position Performance >> Code Enable Criteria

Code Enable Criteria

PCM will run diagnostic for this DTC when system voltage is more than 11 volts and EGR valve is enabled. DTC will set when difference between EGR position sensor parameter and desired EGR position is more than 15 percent for longer than 20 seconds.

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