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Old 03-17-2010, 06:40 PM
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replace PCM? code P0605

ive been having some issues with my truck recently i have been getting the SES light on and off for the past week, i cleared the codes took it through 2 drive cycles and they are back plus more codes so i took it to a local diesal mechanic and he pulled the codes and came up with even more. he checked everything the codes pertain to and everything checked out fine, he checked the codes again and came up with some different codes 2 of them were a P0603 and a P0605. i pulled my edge juice off before all this started and he said that it fried the PCM and it needs to be replaced and he wants to do this by the end of the week, am i being hosed here or is this possible

other codes that came up were engine misfire, bad injector and
P0460
P1395
P1249
sometimes it barely wants to start and runs real rough but for the most part it runs fine with a slightly rough idle. im new to diesels so i really have no clue
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Old 03-17-2010, 08:55 PM
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anyone? i really dont wanna fork a grand to have this pcm replaced if its not the problem
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Old 03-17-2010, 11:25 PM
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no one has experience with replacing a PCM?
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Old 03-18-2010, 01:00 AM
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I did a quick search for your P0603 and a P0605 on the net. I I found one thread with the same codes. codes - TheDieselGarage.com

The two ideas were the CPS is bad, or the fuel heater fuse is blown.
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Old 03-18-2010, 02:32 PM
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so it isnt the PCM its something simple? also my truck runs and starts up fine most of the time but 1/10 times it has a real hard start and barely runs. it would run terrible if it was the CPS wouldnt it?

the mechanic kept trying to tell me that every truck they see that has a tuner they had to replace the PCM because they fry em. I had removed mine before all these problems started.

Last edited by freeride707; 03-18-2010 at 02:37 PM.
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Old 03-18-2010, 03:04 PM
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I am not sure..... hopefully someone will chime in on this.... or just trust your mechanic. Btw, nice looking truck
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Old 03-18-2010, 03:15 PM
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thank you. well there is only one diesel truck shop in my town and the 2 closest ford dealers went out of business because they were scamming people so the next closest dealer picked up all the other employees so i DO NOT trust them but this mechanic i took my truck to has been one for 25 years and everyone i know that has diesels has had good luck with him so hopefully he is right i really dont want to fork out a grand for the PCM if thats not the issue
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Old 03-19-2010, 05:10 AM
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P0603 is nothing to worry about, it's normal with a programmer. P0605 indicates the PCM is having problems. Your mechanic may be right.
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Old 03-19-2010, 01:47 PM
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yea the p0603 is from me unhooking the battereies and clearing the codes i know that but the p0605 at the same time seemed odd to me. hopefully hes right and this doesnt turn out to be another issue
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Old 05-03-2010, 12:32 PM
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Smile remanufactored pcm $295.00

I had to replace my pcm. If you need one for a lot less than a grand goto Automotive Computer Exchange and for under $300.00 they will swap it out. You will have to get some info before ordering.... VIN #, mileage, Part # of old pcm and the DPC # on the sticker from old unit. They need this info to pre-program the unit they send out. The swap is somewhat easy. The unit is near the steering wheel and the plug to disconnect is on engine side of firewall.
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