DTC P2552 problem! HELP!!!! - Ford Powerstroke Diesel Forum
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Old 06-20-2012, 02:29 PM
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DTC P2552 problem! HELP!!!!

To start it is a 2003 F250 6.0, I was driving home the other night and it was running great but as i rolled up to a stop light it started shaking real bad while stopped, and as i took off it sounded like only have the engine was running. It had no power on take off and after about 200 yards it just died and wouldnt restart for nothing. I had it towed home and pulled the DTC with my superchips flashpaq and get p2552. I recently replaced the FICM, i checked the volts KOEO and get 48.4, Any ideas where to start looking or how to fix, all suggestions greatly appreciated!
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Old 06-21-2012, 06:34 AM
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I had the same code come up on me. I pulled the left bank apart to replace and injector and when I reinstalled everything I didn't get the last plug all the way into the FCIM and I started it up and got the P2552 code I unhooked the batteries plugged the harness in then rehooked the batteries and started no more P2552 code....Hopefully you can do this as well.
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Old 06-21-2012, 06:41 AM
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how did your truck run on start up? was it running rough or like usual? mine runs like ****! i will try this and let you know how it goes, i appreciate the help!
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Old 06-23-2012, 01:59 PM
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**UPDATE**

Today i took the relay for the FICM out and tested the harness side and got 12.4 volts on pin 1 (B+ coil) but only 0.22 volts on pin 5 (B+ contacts). they should both read over 10.5 volts each i think, Any one know how to find the open circuit and repair it? and do these numbers even effect the original P2552 DTC. Any advice will help!!!
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Old 06-23-2012, 03:56 PM
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Best as I can tell that is a throttle inhibit circuit open code. A internal PCM circuit fault, your in defuel mode.
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Old 06-09-2014, 03:20 PM
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I know this is an old post but did yall ever find a solution?
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