Codes U100 and U0115 ? -
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post #1 of 10 (permalink) Old 09-13-2009, 04:53 PM Thread Starter
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Codes U100 and U0115 ?

The accelerator pedal went limp. It began to idle a little rough, but when I stepped on the pedal, it was just limp. Since today is sunday, I was not able to take it to the dealer. So I had a friend run the code check and the codes U0100 and U0115 we shown. I checked them against code list but those codes did no appear. Does anyone know what they are?
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post #2 of 10 (permalink) Old 09-13-2009, 05:08 PM
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Same as the other post

U0100 Lost Communication With ECM/PCM "A"

U0115 Lost Communication With ECM/PCM B

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post #3 of 10 (permalink) Old 09-13-2009, 05:19 PM Thread Starter
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Thanks !

Thanks! Is that fixable with a re-flash?
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post #4 of 10 (permalink) Old 10-24-2009, 04:50 PM
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How did you fix this??? I'm in a parking lot with the same problem right now!!

2008 F-250 CC FX4 LOADED - 8" Lift, 20x10 KMC Diesels, 37 Kuhmo M/T's, Bilstein 5100s, HIDs, SCT Tuned with RCD 485, DPF Delete
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post #5 of 10 (permalink) Old 10-27-2009, 03:25 PM
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My truck has been down since Saturday with codes U0073 and U0115 after switching from RCD 450 to Stock. SCT has had my vin, tradegy, device serial, and stock file since early yesterday. They are writing a recovery file. Don't know what caused the problem yet.

2008 F450 4X4, 6.4 PS, Edge CTS, SCT 9625OR with RCD 450 V12 tune, S&B airbox, Flowpro 5" exhaust, down pipe, egr block, Banks intercooler, RCD charge air pipe, Titan 60 gal tank, Air Dog fuel system.
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post #6 of 10 (permalink) Old 01-13-2010, 02:09 AM
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2008 Powerstroke SCT Livewire Issues DTC's , Limp Pedal

I installed the DPF/CAT delete and SCT livewire on my 2008 F250 CC 4x4 6.4L about 2 months ago. No issues until today. I have had to reset the air flow sensor numerous times after full throttle acceleration and I know I need the cold air kit..its coming. But today, I pulled out of a parking lot and accelerated, the truck went in to an idle mode and the check engine icon showed up. I found that if I turned the ignition off and restarted, I could go 100 feet or 5 miles, no certain pattern before it did it again. Went back to stock tune and cleared it all up but no dpf so I had to retune. Same issue again. Talked to Erin at Rudys where I bought the kit and he told me I was the 4th truck today with this issue. Found out that if I activated the tow/haul switch, I could run the truck. It ran rough but I made it home. Erin suggested tuning with the Trans only file and I did and it is running fine now. Definite problem with programming. During all of this, I found some DTC codes: U0115, U0110, U0105, U0100..
I also found some strategy codes: FS0K30 AND TQJE5 and have no idea what these are? Anyone else heard of these issues??
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post #7 of 10 (permalink) Old 01-13-2010, 02:27 AM
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Issues after SCT livewire extreme

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post #8 of 10 (permalink) Old 01-13-2010, 02:45 AM
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U codes are nothing, the other stuff i'm not sure what that is. I can tell you the one thing I dont like about the SCT is the code reader sucks, it dosnt really pick up any codes other than the u codes even if there are codes saved and or a CEL on.

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post #9 of 10 (permalink) Old 01-17-2010, 05:15 AM
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I think the SCT might be causing the U codes. I am not sure exactly why but I have seen it cause codes by checking for codes. as states before, they don't matter, but sure are a nuisance. I havn't seen them from anything other than a livewire.
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post #10 of 10 (permalink) Old 01-17-2010, 12:10 PM
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SCT has had my files since late Thursday and I hopefully will have a fix early this week. The temp has been above freezing here in Houston and I have since reprogrammed back to Extreme tune and have had no issues at all. I am very curious to find out what exactly happened here...I cannot think of any sensor on the truck that would cause the throttle to drop out and make the truck rough idle and lope...
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