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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P0401: Insufficient EGR Flow >> Code Enable Criteria

Code Enable Criteria

Vehicle will need to be driven more than 50 MPH, and then allowed to decelerate. When vehicle is decelerating while meeting all criteria listed below, PCM will enable test to run. As test is running, you will see desired EGR parameter and EGR position sensor on scan tool change from 0 to a calibrated value above 0. For DTC to run, the following conditions must be met:

DTC will set when MAP changes monitored during EGR flow test indicate insufficient EGR flow.