Dealer replaced FICM...now I have DTC p0299 p0683 p0470 - Ford Powerstroke Diesel Forum
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Old 01-16-2011, 10:49 AM
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Dealer replaced FICM...now I have DTC p0299 p0683 p0470

The dealer replaced my FICM for a $100 and put about 12 miles or so on my truck while in for a "NO START" issue. I thought it to be a bad wiring harness with some obvious chafing by the drivers side batter and pcm connection closest to the front bumper. When I hit about mile 20 since the new ficm the CEL popped up. Feeling like I just got sucker punched in the nuts I immediately pulled into advance auto for a quick free scan. Here is what they pulled

P0299 - Turbo underboost
P0683 - GPCM
P0470 - exhaust pressure sensor circuit malfunction

Before I took the truck in I was getting the dtc for a bad FICM, GPCM and every now and then a bad #5 injector.

My questions are:

1. Do these 3 DTC's together commonly mean a certain problem is wrong?

2. Is the equipment associated with the DTC's all connected in the same wire harness bundle (i.e.chasis harness, injector harness)

3. When the dealer replaced the FICM is it possible that something related to the DTC's was damaged?

4. Is it safe to drive?

I must also note that I had an AFE stage 2 intake that I had a mechanic friend remove and re-install the factory air intake set up. I believe the Turbo has been sticking for quiet some time now. When I first start it up it will run rough for a lil bit, I'll hear a screeching sound and then my truck transforms from a lobing chugging car to a it's usual jet engine like sound.

I'm taking it back to the dealer ship asap. First I have to the trans (Suncoast superduty rebuild with 300mm input shaft and billet torque converter) serviced.

Thanks in advance!
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Old 01-16-2011, 10:52 AM
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My engine mods are:
ARP head studs
AFE stage 2 intake - not installed right now
Accufab big mouth elbow
MBRP 5" exhaust with down tube (I believe that means no cat, but if it doesn't I took that out too!)
not sure if it matters or not but I installed a new egr a lil while back.
SCT for ID with tunes by eric not installed right now

Trans mods are:

Suncoast superduty rebuild
300mm billet torque converter
billet input shaft
extra deep trans pan
extra filter
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