LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2002 >> Regal LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P0401: EGR System Insufficient Flow >> Test Description

Test Description

The number below refers to the step number in the diagnostic procedures.

  1. 2

    This DTC is set when the PCM does not detect a predetermined change in MAP when the EGR valve is commanded. This step inspects for any MAP sensor DTCs. A malfunctioning MAP sensor may cause this DTC to set.
scientia non olet · About LEMON Manuals