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u0306 Code ?

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Old Jul 20, 2011 | 07:51 PM
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u0306 Code ?
truck seems to be running fine. but today it started pulling a u0306 Sortware incompatiable with FICM. and a p1000 code. any sugguestions?
 
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Old Jul 20, 2011 | 08:21 PM
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low voltage or file corruption. if the code comes back attempt to reflash pcm,tcm,ficm.
 
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Old Jul 20, 2011 | 08:23 PM
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typically will a reflash fix it or do you think i need to check the FICM to see if its still good?
 
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Old Jul 20, 2011 | 08:25 PM
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I would not have stated such If it was/has not been effective prior. code is either pcm or ficm based one does not like the other.
as I suggested prior low voltage can set this as well. earase the code and see if it comes back.
 
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Old Jul 20, 2011 | 08:47 PM
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it comes back immediatly after you clear it.
 
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Old Jul 20, 2011 | 08:50 PM
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check battery voltage and charging system. could be an internial module issue... still I would attempt to reflash first
 
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Old Jul 20, 2011 | 08:52 PM
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Ill try that first thing in the morning !! Thanks !!
 
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Old Jul 21, 2011 | 09:54 AM
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cleared all codes this morning and now in addition to the U0306 and The P1000 it is now pulling P0275 - cylinder 5 contribution balance and P0683 - Glow plug control module to pcm communication circut. still thinking it needs flashed?
 
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Old Jul 21, 2011 | 02:22 PM
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Have you recently changed the FICM?
 
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Old Jul 29, 2021 | 03:56 PM
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Uo306 code .
  1. Originally Posted by npccpartsman
    Have you recently changed the FICM?
I changed the ficm and had heard I might have to get it programed???
 
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Old Jul 29, 2021 | 04:36 PM
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I don't think so. You might start a new thread of your own however, to get more visibility.
 
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Old Jul 30, 2021 | 08:27 PM
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Just curious, does the PCM have the function of doing a “hard reset” on itself? Like a complete power down and memory wipe that would set a P-1000 is what I’m wondering. If not then the power is being interrupted somehow to get the P-1000 or was interrupted at least once recently. I believe once it’s there it requires a set number of drive cycles to clear and it would be difficult to know if it is a “fresh” code but I’ve never considered how this works before and I have thought it around in circles for quite awhile today.

I believe I remember a P-1000 will persist even after clearing codes like the emission readiness indicators do.
 
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