FICM repair & now P2552

[Alfs]

Hey guys I have a little problem, I removed my FICM got it repaired and installed it last night and all my low voltage to injector codes went away and FICM voltage is a lot better than before (previously low 20's). Now I have code P2552: Throttle/Fuel inhibit Circut/ Open and I have no clue what that means, if anybody could help point me in the right direction I would greatly appreciate it. I really hope a pin did not get bent when installing the FICM if did this happen how hard would it be to repair a bent pin?? I have read other posts on this issue but they were all just left behind and no real insight was given. Thanks in advance and thanks for all the knowledge around here it has helped me tremendously since purchasing my truck.

BTW my truck details:

2003 F250 6.0 no tunes
EDGE CTS insight with egt probe

[PSDMikeB]

My chart shows for that code:
P2552 FICMM Circuit - Throttle/Fuel Inhibit Circuit
No signal from the FICM Monitor circuit
Circuit open/short, FICM, PCM

I think you have already figured out the problem. Either you bent a pin or did not seat the connectors fully. It can be a bear to get them on 100%.

Worth a shot to take it off and inspect the pins really close, including on the wire side. Another possibility is by moving the wires around you may have found a wire chafe that is now grounding out. Take a real close look at the FICM wiring where the valve cover bolts are.

MikeB

[Alfs]

Thanks for the reply MikeB, I went home last night and poked around a bit and found no chafes in the wires. There was one wire that looked like it had been pressed against something but the insulation was still intact, I went ahead and did a lil repair work on it and continued to remove the FICM. What I found was the middle connector was not completely engaged, one of the tabs did not clip in. After checking for bent pins and luckily there were none I attempted to re install the middle clip and boy is it a PITA and could not get that second tab to clip in. I ran out of day light and time but hopefully today I will get it figured out. Thanks again for your input.

[PSDMikeB]

No Problem

I am 99% confident that will be the solution to your problem. Report back and let us know if it works.

MikeB

[Alfs]

Thanks again MIKEB I did get the clips fully engaged (or so it seemed) and the code went away but came back a few mins later. I have not driven the truck since the FICM repair because I was waiting on the hose from the coolant tank to the water pump since it broke when moving the tank out of the way initially. I have fixed that as well, But maybe putting a few miles on it will clear it up?

[fordparts]

how does a pin in ficm bend... we installed a ficm 20 months and 12,000 miles ago and customer is back saying we bent the pin. wouldnt the vehicle not have run well in this timeframe if we bent pin when installing ficm

[southend]

Originally Posted by fordparts

how does a pin in ficm bend... we installed a ficm 20 months and 12,000 miles ago and customer is back saying we bent the pin. wouldnt the vehicle not have run well in this timeframe if we bent pin when installing ficm

More than likely, it would have had problems to begin with.

Sent from my phone that somebody didn't help me get.

[dannyboy950]

You may not have bennt a pin but you may have one trying to back out.
Sometimes when wires in a plug are back probed the lock tab gets damaged and no longer holds the pin from backing out.