Damn SES light again...

I replaced the EGR and after a month later the SES light is on again. Took my truck to Advance and he scanned it again and said it was the EGR. I took the EGR off and checked it like the Haynes Repair manual says, the volts and the OHMS. The light went off after I did all that and now its back on. Is this just a bad EGR or what are your opions? Thanks for the help.


01- Z71-5.3


:banghead:

Sounds like there is something that is triggering the EGR.
I found this.. it is for a Ford F series truck, but should give you a pretty good idea on how the EGR functions and allow you to trouble shoot

http://www.iroc-zpostforum.com/Tech/TechEGRDiag&Diagrams.htm

I replaced the EGR and after a month later the SES light is on again. Took my truck to Advance and he scanned it again and said it was the EGR. I took the EGR off and checked it like the Haynes Repair manual says, the volts and the OHMS. The light went off after I did all that and now its back on. Is this just a bad EGR or what are your opions? Thanks for the help.


01- Z71-5.3


:banghead:

Year and model and engine and mileage?
What was the code no.?

I'd perform an EGR delete.

2001
101700k
5.3 z71


EGR delete?