possible pcm failure

bradrhale · 06-07-2009, 07:21 AM

neighbor has a 99 dodge that is throwing a p0601 code. they are complaining about high gas consumption but dont believe this is a related problem. poor people and would hate to see them spend 300 on something that might not need be replaced. is this code directly tied to just the memory or can it be something else?? i have suggested scanning it but wanted to get some info about this first.

stumpuller454 · 06-07-2009, 07:24 AM

not sure what the code is for but whenever it involves pricy parts changes a guy should exhaust himself to make sure its not just a wiring problem.... which is just so much FUN!!!

bradrhale · 06-07-2009, 07:29 AM

P0601 - Internal powertrain control module fault condition detected (failed memory check)
that is pretty much all the info i could get besides getting this one flashed or buying a new one.

stumpuller454 · 06-07-2009, 07:32 AM

huh, really sounds like it pin-points the problem! does it re-appear after bieng cleared?

bradrhale · 06-07-2009, 07:34 AM

i reset it yesterday with a code reader yesterday and it did go away. 30 miles of driving brought it back though. agree with you though. it does seem like it pinpoints the problem.

mudseeker · 06-07-2009, 09:04 AM

can you pull the freeze frame data and post it on here?
i'll do some snooping and see what i can find.

mudseeker · 06-07-2009, 09:12 AM

sorry bud

This diagnostic applies to internal microprocessor integrity conditions within the control module. This diagnostic also addresses if the control module is not programmed. The following DTCs are diagnosed in this DTC table:

DTC P0601
DTC P0602
DTC P0604
DTC P0606
DTC P1683

bradrhale · 06-07-2009, 01:45 PM

cant post anything as no scanner has been hooked up. after doing some more reading, a new PCM is instore for this truck. from what i understand, the only problem is that it is not communicating with the memory. there really is no per say problem with the control module. i dont believe that this is devastating to the operation of the truck but does need attention. do you see any reason why the truck cannot be run for a short while with the communication failure??

mudseeker · 06-07-2009, 01:52 PM

biggest problem would probably be your long term fuel trim seeing as the PCM probably can't store driveabilty info.

gmctrucks · 06-07-2009, 05:20 PM

Brad I know that there is places that rebuilt them. Or try the bone yard.

06-07-2009, 07:21 AM	#1
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,025	possible pcm failure neighbor has a 99 dodge that is throwing a p0601 code. they are complaining about high gas consumption but dont believe this is a related problem. poor people and would hate to see them spend 300 on something that might not need be replaced. is this code directly tied to just the memory or can it be something else?? i have suggested scanning it but wanted to get some info about this first.

06-07-2009, 07:24 AM	#2
stumpuller454 Senior Member Join Date: Dec 2007 Location: Grande Prairie, AB Posts: 2,043	not sure what the code is for but whenever it involves pricy parts changes a guy should exhaust himself to make sure its not just a wiring problem.... which is just so much FUN!!! __________________ SUPERCHARGED 454 K2500 GMC! 450hp and 600ft/lbs http://www.youtube.com/watch?v=WJ27RJHfJKE "sailing with Captain Morgan often!"

06-07-2009, 07:32 AM	#4
stumpuller454 Senior Member Join Date: Dec 2007 Location: Grande Prairie, AB Posts: 2,043	huh, really sounds like it pin-points the problem! does it re-appear after bieng cleared? __________________ SUPERCHARGED 454 K2500 GMC! 450hp and 600ft/lbs http://www.youtube.com/watch?v=WJ27RJHfJKE "sailing with Captain Morgan often!"

06-07-2009, 09:04 AM	#6
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	can you pull the freeze frame data and post it on here? i'll do some snooping and see what i can find. __________________ i'd rather be hunting

06-07-2009, 09:12 AM	#7
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	sorry bud This diagnostic applies to internal microprocessor integrity conditions within the control module. This diagnostic also addresses if the control module is not programmed. The following DTCs are diagnosed in this DTC table: DTC P0601 DTC P0602 DTC P0604 DTC P0606 DTC P1683 Attached Thumbnails __________________ i'd rather be hunting

06-07-2009, 07:29 AM	#3
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,025	P0601 - Internal powertrain control module fault condition detected (failed memory check) that is pretty much all the info i could get besides getting this one flashed or buying a new one.

06-07-2009, 07:34 AM	#5
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,025	i reset it yesterday with a code reader yesterday and it did go away. 30 miles of driving brought it back though. agree with you though. it does seem like it pinpoints the problem.

06-07-2009, 01:45 PM	#8
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,025	cant post anything as no scanner has been hooked up. after doing some more reading, a new PCM is instore for this truck. from what i understand, the only problem is that it is not communicating with the memory. there really is no per say problem with the control module. i dont believe that this is devastating to the operation of the truck but does need attention. do you see any reason why the truck cannot be run for a short while with the communication failure??

06-07-2009, 01:52 PM	#9
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,374	biggest problem would probably be your long term fuel trim seeing as the PCM probably can't store driveabilty info. __________________ i'd rather be hunting

06-07-2009, 05:20 PM	#10
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,033	Brad I know that there is places that rebuilt them. Or try the bone yard.

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