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Home >> Buick >> 2007 >> Lucerne CXL, 3.8 2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.8L - DTC P0350 To DTC P0607 >> DTC P0404 >> Circuit/System Verification

Circuit/System Verification

With the ignition ON and the engine OFF, command the EGR from 0-100 percent. The EGR Position Sensor parameter should remain within 3 percent of the Desired EGR Position parameter.