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post #1 of 4 Old 07-22-2013, 09:43 PM Thread Starter
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Bad FICM?

Hi guys and gals,


2005 F250 6.0

Few weeks ago the check engine light came on and I received a few trouble codes. P0611, P0671, and U1900. I tested the FICM and the voltage was a little below what it should be at so I sent it in for repair. I just got done putting the truck back together and am still receiving the same trouble codes in addition to a new one B2900 (VIN Mismatch). Any easy fixes or ideas before I need to replace the FICM completely and the Glow plugs?
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post #2 of 4 Old 07-22-2013, 10:34 PM
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Did you check the FICM wiring harness? They are know to rub in certain spots and cause weird problems with the FICM. And welcome to the org!

05 F-250 Crew Cab Short Bed
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post #3 of 4 Old 07-23-2013, 08:18 AM Thread Starter
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Thanks for the prompt response. I have not checked the wiring harness yet but will take the truck apart again and take a second look.
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post #4 of 4 Old 07-23-2013, 10:25 PM
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There are lots of trouble areas... common locations are at the valve cover bolts, near the FICM, intake bolts where the wire harness goes under the air intake hose, around the thermostat housing, idler pulleys, glow plug relay brace, relay box braces, and near the PCM by the battery. Ther is probably more but this is info that I found when I was diagnosing a bad FICM wire problem on a truck a while back.

05 F-250 Crew Cab Short Bed
ARPs w/OEM Gaskets
MTW Stage 2 w/batmowheel
BPD oil cooler w/ cold weather package
BPD Updated umm...Everything
BPD bypass oil filter
BPD FICM 58v
Spring Mod
Egr deleted
4" Duals
Edge CTS
Custom grille made by Me
X3 w/Matts SRL+/SRLxx and Tow Tunes
Tony WildmanExtreme w/early lockup



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