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  #1  
Old 01-01-2012, 07:26 PM
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P2552 CODE

Okay just replaced my ficm now i'm getting code p2552 i've checked all wires about three times now and haven't noticed any loss in power. the turbo psi gauge is acting strange now (reached about 27 psi never has before) any help will be greatly appreciated
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Old 01-01-2012, 08:04 PM
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P2552: FICMM (fuel injector control module monitor) Circuit-Throttle/Fuel Inhibit circuit
Here is what it is and what it does:

Quote:
Signal Function:

The diesel engine power monitor (DEPM) strategy resides in the transmission module (TCM) located inside the powertrain control module (PCM). The function of the DEPM is to monitor the engine RPM when there is no power demand from the accelerator pedal position (APP) sensor.
Under normal engine idle operation the DEPM RPM value must always be higher than the engine RPM. In the event that the engine RPM does not exceed the DEPM limit, the DEPM disables the crankshaft and camshaft output signal sent to the PCM to the FICM.

Detection/Management:

The FICMM input line informs the diesel engine power monitor (DEPM) when the injectors are turned on and off. When the FICMM line is either shorted or open, the monitor strategy assumes that the fuel injectors are always turned on and sets DTC P2552. When P2552 is set, the DEPM may set DTC P0148. When DTC P0148 is set, DTC's P2614 (CMPO failure) and P2617 (CKPO failure) may also set. If DTC's P2614 or P2617 are set with P0148, do not attempt to diagnose the CMPO or CKPO circuits. DTC's P1378 or P1379 (FICM voltage) may also cause DTC's P2552, P0148, P2614 and/or P2617 to be set.
By reading the pinpoint tests, it sounds as though there is a short somewhere in the harness between the FICM and the PCM. Check that harness over for any signs of chafing. If you have a multimeter and can find a pinout diagram for the FICM and PCM connectors, I will copy paste all the pinpoint tests if you need.
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Old 01-02-2012, 09:04 PM
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Could that cause the transmission to shift weird?
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Old 01-03-2012, 04:55 AM
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Quote:
Originally Posted by JD_MILLS View Post
Could that cause the transmission to shift weird?
I'm sure that it could.
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Old 01-03-2012, 09:45 AM
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could the new ficm cause that? shoud i see if they'll give me a new one?
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Old 01-03-2012, 09:50 AM
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By reading the pinpoint tests, most of them point to this being a harness issue and not a FICM issue.
If you have a friend close by with a 6.0, you could try another FICM. I imagine it could be an internal FICM issue as well.
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Old 01-03-2012, 10:25 AM
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Quote:
Originally Posted by JD_MILLS View Post
could the new ficm cause that? shoud i see if they'll give me a new one?
I may be wrong, but I though a new FICM needed to be programmed with the correct strategy of ECM. I didn't think you could just buy a new FICM and slap it in.... It's been a long time since I read what makes me think this, so I may be off base a little too.....
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Old 01-03-2012, 11:59 AM
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Quote:
Originally Posted by SixStringMadness View Post
I may be wrong, but I though a new FICM needed to be programmed with the correct strategy of ECM. I didn't think you could just buy a new FICM and slap it in.... It's been a long time since I read what makes me think this, so I may be off base a little too.....
Good point. If he has a NEW FICM from Ford, then yes, it would have to be programmed to work properly. But if it was a repaired unit, it should work.
Guess I should have asked the definition of "new FICM" here...
When my FICM took a dirt nap on me about a month ago, I got one from a forum member that was on an 03 model. It works just fine in my 06 (actually it runs better now than when I had the 06 FICM). I doubt the 03 had the same ECM strategy, though anything is possible.
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Old 01-03-2012, 06:01 PM
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I have the original one it was repaired. i had a p0611 code had it repaired and started getting p2552 code now. something isn't right about it.(can't quite put my finger on it) it doesn't seem to have lost any power though. transmission seems to be shifting strange also though. seems like it couldn't find the right gear. and my turbo psi gauge started moving with the rpm gauge and went up to about 30 at wot. it used to stay around 10 wheather its idling or the rpm's where around 3000 so i'm clueless

Last edited by JD_MILLS; 01-03-2012 at 06:14 PM.
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Old 01-04-2012, 05:43 AM
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Quote:
Originally Posted by JD_MILLS View Post
I have the original one it was repaired. i had a p0611 code had it repaired and started getting p2552 code now. something isn't right about it.(can't quite put my finger on it) it doesn't seem to have lost any power though. transmission seems to be shifting strange also though. seems like it couldn't find the right gear. and my turbo psi gauge started moving with the rpm gauge and went up to about 30 at wot. it used to stay around 10 wheather its idling or the rpm's where around 3000 so i'm clueless
Boost at idle should not be more that 1 psi, so 10 means either a faulty gauge or wiring. 27-30 at WOT is normal, 4-6 during steady driving on level ground, and as high as 14 - 17 while driving up hill, holding speed, more if accelerating up hill.

It sounds like you may have a the 6.0 electrical boogieman living under your hood.
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