Re: EGR Tube 2002 Explorer 4.0
Not sure if this might apply / help .
PO401 code means that:
The PCM has determined that there is insufficient flow in the exhaust gas recirculation system. Definition: EGR system fault (Exhaust Gas Recirculation) Probable Causes: a. Blocked passage on EGR system b. Failed EGR Valve c. EGR solenoid faulty d. Failed EGR pressure sensor where applicable e. Failed EGR position sensor where applicable
2002 Ford Explorer 4.0L V-6
The EGR valve isn't getting the vaccum required to operate the valve. Check engine light is on.
do you have a code for egr? if you do follow the hose all the way to the egr solenoid and make sure the other hose attached to the solenoid has vacuum, the egr only gets vacuum when the computer triggers it but not all the time .