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Rocinante
10-27-2005, 09:21
Hi,
I have a 2003 2500HD D/A with 66,000 miles, not a single problem with the engine or tranny. Yesterday while turning a corner the engine bucked about three times and the check engine light came on. I have a programer that will read DTCs and it indicated that code "P1093" has been written. Does anybody know what that code indicates?

Thanks
ynot
10-27-2005, 09:49
Low rail pressure. Do a search on shimming the bypass valve (and change your fuel filter)...T
Kennedy
10-27-2005, 10:38
LB7 is different than the LLY as for shimming. I'd look at the filter first...
ynot
10-27-2005, 15:08
Originally posted by kennedy:
LB7 is different than the LLY as for shimming. I'd look at the filter first... Good catch John, didn't notice the LB7 thing...T
Kennedy
10-28-2005, 06:53
Being a 2003, it could well have injector issues also. These seem to deliver excessive return rates when in fail mode which drops psi excessively.

Check filter first of course...
Rocinante
10-29-2005, 09:03
Thanks for the info, I'll be changing the FF as soon as I get the Mega Filter kit from John. :D