2002 ford explorer xlt code PO231

[rauld07]

I have a 2002 ford explorer xlt v6 4.0. About 2 or 3 months ago, i had my fuel pump replaced, after a week or so, my "service engine soon" light came on. i had two codes causing that, first code was the, "PO455" and "PO231", I took care of the first code, but can not figure out whats wrong with the second one. The code "PO231" is a "Fuel pump secondary circuit low" problem. Posiible causes include: blown fuel pump fuse, open fuel pump monitor circuit, and faulty fuel pump relay. I have replaced the fuel pump relay, and the fuel pump fuse is still good. I don't know where to go to from here... please help.


note: the vehicle does turn on, it drives ok, it has not turned off on me.

 

[Number4]

Have you tried this?

Tech notes
For some FORD models:
1. Disconnect the inertia switch harness connector
2. Turn key to ON position (Engine OFF)
3. Measure voltage of circuit between inertia switch harness connector and ground
4. If battery voltage is found, replaced Inertia Switch
5. Clear codes.


Read more: http://engine-codes.com/p0231_ford.html#ixzz3bcfuBsxW

This video doesn't really tell you much....
https://m.youtube.com/watch?v=WDfcSAFri_Q

 

[rauld07]

Uupdate

UPDATE: So, my truck's hose EVAP hose wast cut(thus disconnected) and also lead to my fuel cap light being on. I put a inner tube to re-connect the hose together, since then, my fuel cap light went off, and just this morning my seervice light engine went off as well. I hope everything with my truck is ok, but only time will tell. thanks for the help.

 

[ArcticGabe]

Nice! Thanks for the update.